21798980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155707}}^1$

素因数の和:155723

約数の個数: 24

約数和(自身を含む): 52317888

約数和(自身を除く): 30518908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155707, 311414, 622828, 778535, 1089949, 1557070, 2179898, 3114140, 4359796, 5449745, 10899490, 21798980]

約数ペア:

[(1, 21798980), (2, 10899490), (4, 5449745), (5, 4359796), (7, 3114140), (10, 2179898), (14, 1557070), (20, 1089949), (28, 778535), (35, 622828), (70, 311414), (140, 155707)]