21858820

素因数分解:

$2^2\times 5^1\times {\mathrm{397}}^1\times {\mathrm{2753}}^1$

素因数の和:3159

約数の個数: 24

約数和(自身を含む): 46035864

約数和(自身を除く): 24177044

約数列:

[1, 2, 4, 5, 10, 20, 397, 794, 1588, 1985, 2753, 3970, 5506, 7940, 11012, 13765, 27530, 55060, 1092941, 2185882, 4371764, 5464705, 10929410, 21858820]

約数ペア:

[(1, 21858820), (2, 10929410), (4, 5464705), (5, 4371764), (10, 2185882), (20, 1092941), (397, 55060), (794, 27530), (1588, 13765), (1985, 11012), (2753, 7940), (3970, 5506)]