21871580

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{2099}}^1$

素因数の和:2629

約数の個数: 24

約数和(自身を含む): 46040400

約数和(自身を除く): 24168820

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 2084, 2099, 2605, 4198, 5210, 8396, 10420, 10495, 20990, 41980, 1093579, 2187158, 4374316, 5467895, 10935790, 21871580]

約数ペア:

[(1, 21871580), (2, 10935790), (4, 5467895), (5, 4374316), (10, 2187158), (20, 1093579), (521, 41980), (1042, 20990), (2084, 10495), (2099, 10420), (2605, 8396), (4198, 5210)]