21155780

素因数分解:

$2^2\times 5^1\times {\mathrm{379}}^1\times {\mathrm{2791}}^1$

素因数の和:3179

約数の個数: 24

約数和(自身を含む): 44560320

約数和(自身を除く): 23404540

約数列:

[1, 2, 4, 5, 10, 20, 379, 758, 1516, 1895, 2791, 3790, 5582, 7580, 11164, 13955, 27910, 55820, 1057789, 2115578, 4231156, 5288945, 10577890, 21155780]

約数ペア:

[(1, 21155780), (2, 10577890), (4, 5288945), (5, 4231156), (10, 2115578), (20, 1057789), (379, 55820), (758, 27910), (1516, 13955), (1895, 11164), (2791, 7580), (3790, 5582)]