16521980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{269}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 36197280

約数和(自身を除く): 19675300

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 83, 148, 166, 185, 269, 332, 370, 415, 538, 740, 830, 1076, 1345, 1660, 2690, 3071, 5380, 6142, 9953, 12284, 15355, 19906, 22327, 30710, 39812, 44654, 49765, 61420, 89308, 99530, 111635, 199060, 223270, 446540, 826099, 1652198, 3304396, 4130495, 8260990, 16521980]

約数ペア:

[(1, 16521980), (2, 8260990), (4, 4130495), (5, 3304396), (10, 1652198), (20, 826099), (37, 446540), (74, 223270), (83, 199060), (148, 111635), (166, 99530), (185, 89308), (269, 61420), (332, 49765), (370, 44654), (415, 39812), (538, 30710), (740, 22327), (830, 19906), (1076, 15355), (1345, 12284), (1660, 9953), (2690, 6142), (3071, 5380)]