21285820

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{6373}}^1$

素因数の和:6549

約数の個数: 24

約数和(自身を含む): 44974944

約数和(自身を除く): 23689124

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 668, 835, 1670, 3340, 6373, 12746, 25492, 31865, 63730, 127460, 1064291, 2128582, 4257164, 5321455, 10642910, 21285820]

約数ペア:

[(1, 21285820), (2, 10642910), (4, 5321455), (5, 4257164), (10, 2128582), (20, 1064291), (167, 127460), (334, 63730), (668, 31865), (835, 25492), (1670, 12746), (3340, 6373)]