21203260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81551}}^1$

素因数の和:81573

約数の個数: 24

約数和(自身を含む): 47952576

約数和(自身を除く): 26749316

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81551, 163102, 326204, 407755, 815510, 1060163, 1631020, 2120326, 4240652, 5300815, 10601630, 21203260]

約数ペア:

[(1, 21203260), (2, 10601630), (4, 5300815), (5, 4240652), (10, 2120326), (13, 1631020), (20, 1060163), (26, 815510), (52, 407755), (65, 326204), (130, 163102), (260, 81551)]