21265210

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1$

素因数の和:630

約数の個数: 32

約数和(自身を含む): 39533184

約数和(自身を除く): 18267974

約数列:

[1, 2, 5, 10, 61, 71, 122, 142, 305, 355, 491, 610, 710, 982, 2455, 4331, 4910, 8662, 21655, 29951, 34861, 43310, 59902, 69722, 149755, 174305, 299510, 348610, 2126521, 4253042, 10632605, 21265210]

約数ペア:

[(1, 21265210), (2, 10632605), (5, 4253042), (10, 2126521), (61, 348610), (71, 299510), (122, 174305), (142, 149755), (305, 69722), (355, 59902), (491, 43310), (610, 34861), (710, 29951), (982, 21655), (2455, 8662), (4331, 4910)]