21512090

素因数分解:

$2^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{4129}}^1$

素因数の和:4657

約数の個数: 16

約数和(自身を含む): 38805480

約数和(自身を除く): 17293390

約数列:

[1, 2, 5, 10, 521, 1042, 2605, 4129, 5210, 8258, 20645, 41290, 2151209, 4302418, 10756045, 21512090]

約数ペア:

[(1, 21512090), (2, 10756045), (5, 4302418), (10, 2151209), (521, 41290), (1042, 20645), (2605, 8258), (4129, 5210)]