21068660

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1063}}^1$

素因数の和:2063

約数の個数: 24

約数和(自身を含む): 44330496

約数和(自身を除く): 23261836

約数列:

[1, 2, 4, 5, 10, 20, 991, 1063, 1982, 2126, 3964, 4252, 4955, 5315, 9910, 10630, 19820, 21260, 1053433, 2106866, 4213732, 5267165, 10534330, 21068660]

約数ペア:

[(1, 21068660), (2, 10534330), (4, 5267165), (5, 4213732), (10, 2106866), (20, 1053433), (991, 21260), (1063, 19820), (1982, 10630), (2126, 9910), (3964, 5315), (4252, 4955)]