21623620

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1091}}^1$

素因数の和:2091

約数の個数: 24

約数和(自身を含む): 45497088

約数和(自身を除く): 23873468

約数列:

[1, 2, 4, 5, 10, 20, 991, 1091, 1982, 2182, 3964, 4364, 4955, 5455, 9910, 10910, 19820, 21820, 1081181, 2162362, 4324724, 5405905, 10811810, 21623620]

約数ペア:

[(1, 21623620), (2, 10811810), (4, 5405905), (5, 4324724), (10, 2162362), (20, 1081181), (991, 21820), (1091, 19820), (1982, 10910), (2182, 9910), (3964, 5455), (4364, 4955)]