21077740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24509}}^1$

素因数の和:24561

約数の個数: 24

約数和(自身を含む): 45294480

約数和(自身を除く): 24216740

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24509, 49018, 98036, 122545, 245090, 490180, 1053887, 2107774, 4215548, 5269435, 10538870, 21077740]

約数ペア:

[(1, 21077740), (2, 10538870), (4, 5269435), (5, 4215548), (10, 2107774), (20, 1053887), (43, 490180), (86, 245090), (172, 122545), (215, 98036), (430, 49018), (860, 24509)]