21861980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{156157}}^1$

素因数の和:156173

約数の個数: 24

約数和(自身を含む): 52469088

約数和(自身を除く): 30607108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 156157, 312314, 624628, 780785, 1093099, 1561570, 2186198, 3123140, 4372396, 5465495, 10930990, 21861980]

約数ペア:

[(1, 21861980), (2, 10930990), (4, 5465495), (5, 4372396), (7, 3123140), (10, 2186198), (14, 1561570), (20, 1093099), (28, 780785), (35, 624628), (70, 312314), (140, 156157)]