39978640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2957}}^1$

素因数の和:2996

約数の個数: 60

約数和(自身を含む): 100684404

約数和(自身を除く): 60705764

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1690, 2704, 2957, 3380, 5914, 6760, 11828, 13520, 14785, 23656, 29570, 38441, 47312, 59140, 76882, 118280, 153764, 192205, 236560, 307528, 384410, 499733, 615056, 768820, 999466, 1537640, 1998932, 2498665, 3075280, 3997864, 4997330, 7995728, 9994660, 19989320, 39978640]

約数ペア:

[(1, 39978640), (2, 19989320), (4, 9994660), (5, 7995728), (8, 4997330), (10, 3997864), (13, 3075280), (16, 2498665), (20, 1998932), (26, 1537640), (40, 999466), (52, 768820), (65, 615056), (80, 499733), (104, 384410), (130, 307528), (169, 236560), (208, 192205), (260, 153764), (338, 118280), (520, 76882), (676, 59140), (845, 47312), (1040, 38441), (1352, 29570), (1690, 23656), (2704, 14785), (2957, 13520), (3380, 11828), (5914, 6760)]