399620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1$

素因数の和:104

約数の個数: 48

約数和(自身を含む): 952560

約数和(自身を除く): 552940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 53, 58, 65, 106, 116, 130, 145, 212, 260, 265, 290, 377, 530, 580, 689, 754, 1060, 1378, 1508, 1537, 1885, 2756, 3074, 3445, 3770, 6148, 6890, 7540, 7685, 13780, 15370, 19981, 30740, 39962, 79924, 99905, 199810, 399620]

約数ペア:

[(1, 399620), (2, 199810), (4, 99905), (5, 79924), (10, 39962), (13, 30740), (20, 19981), (26, 15370), (29, 13780), (52, 7685), (53, 7540), (58, 6890), (65, 6148), (106, 3770), (116, 3445), (130, 3074), (145, 2756), (212, 1885), (260, 1537), (265, 1508), (290, 1378), (377, 1060), (530, 754), (580, 689)]