21671570

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{499}}^1$

素因数の和:650

約数の個数: 32

約数和(自身を含む): 40392000

約数和(自身を除く): 18720430

約数列:

[1, 2, 5, 10, 43, 86, 101, 202, 215, 430, 499, 505, 998, 1010, 2495, 4343, 4990, 8686, 21457, 21715, 42914, 43430, 50399, 100798, 107285, 214570, 251995, 503990, 2167157, 4334314, 10835785, 21671570]

約数ペア:

[(1, 21671570), (2, 10835785), (5, 4334314), (10, 2167157), (43, 503990), (86, 251995), (101, 214570), (202, 107285), (215, 100798), (430, 50399), (499, 43430), (505, 42914), (998, 21715), (1010, 21457), (2495, 8686), (4343, 4990)]