21656740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154691}}^1$

素因数の和:154707

約数の個数: 24

約数和(自身を含む): 51976512

約数和(自身を除く): 30319772

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154691, 309382, 618764, 773455, 1082837, 1546910, 2165674, 3093820, 4331348, 5414185, 10828370, 21656740]

約数ペア:

[(1, 21656740), (2, 10828370), (4, 5414185), (5, 4331348), (7, 3093820), (10, 2165674), (14, 1546910), (20, 1082837), (28, 773455), (35, 618764), (70, 309382), (140, 154691)]