21645820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154613}}^1$

素因数の和:154629

約数の個数: 24

約数和(自身を含む): 51950304

約数和(自身を除く): 30304484

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154613, 309226, 618452, 773065, 1082291, 1546130, 2164582, 3092260, 4329164, 5411455, 10822910, 21645820]

約数ペア:

[(1, 21645820), (2, 10822910), (4, 5411455), (5, 4329164), (7, 3092260), (10, 2164582), (14, 1546130), (20, 1082291), (28, 773065), (35, 618452), (70, 309226), (140, 154613)]