21557780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{56731}}^1$

素因数の和:56759

約数の個数: 24

約数和(自身を含む): 47654880

約数和(自身を除く): 26097100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 56731, 113462, 226924, 283655, 567310, 1077889, 1134620, 2155778, 4311556, 5389445, 10778890, 21557780]

約数ペア:

[(1, 21557780), (2, 10778890), (4, 5389445), (5, 4311556), (10, 2155778), (19, 1134620), (20, 1077889), (38, 567310), (76, 283655), (95, 226924), (190, 113462), (380, 56731)]