21298730

素因数分解:

$2^1\times 5^1\times {\mathrm{223}}^1\times {\mathrm{9551}}^1$

素因数の和:9781

約数の個数: 16

約数和(自身を含む): 38513664

約数和(自身を除く): 17214934

約数列:

[1, 2, 5, 10, 223, 446, 1115, 2230, 9551, 19102, 47755, 95510, 2129873, 4259746, 10649365, 21298730]

約数ペア:

[(1, 21298730), (2, 10649365), (5, 4259746), (10, 2129873), (223, 95510), (446, 47755), (1115, 19102), (2230, 9551)]