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A069064
Integers which have at least two different factorizations into coprime parts whose sum are equal.
2
420, 546, 1260, 1365, 1950, 2310, 2730, 2964, 3990, 4095, 4218, 4284, 4290, 4420, 4510, 4620, 5100, 5460, 5610, 6006, 6090, 6160, 6270, 6370, 6510, 6930, 7140, 7161, 7350, 7410, 7440, 7590, 7980, 8190, 8580, 8645, 8970, 9100, 9240, 9282, 9394, 9660, 9690, 9870
OFFSET
1,1
LINKS
Sean A. Irvine, Java program (github)
EXAMPLE
420 is in the sequence as 5*4*21 = 3*7*20 = 420 and 5+4+21 = 30 = 3+7+20.
For 546, it is 546 = 3*7*26 = 2*13*21 and 3+7+26 = 36 = 2+13+21.
2964 is in the sequence as 3*19*52 = 4*13*57 = 2964 and 3+19+52 = 4+13+57 = 74. - Sean A. Irvine, Apr 01 2024
CROSSREFS
Cf. A072940.
Sequence in context: A239253 A061118 A097822 * A024410 A200521 A350374
KEYWORD
easy,nonn
AUTHOR
Mike Domaratzki (domaratzki(AT)alumni.uwaterloo.ca), Aug 12 2002
EXTENSIONS
Missing 2964 and 7161 inserted by Sean A. Irvine, Apr 01 2024
STATUS
approved