221796140

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{43151}}^1$

素因数の和:43417

約数の個数: 24

約数和(自身を含む): 467595072

約数和(自身を除く): 245798932

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 43151, 86302, 172604, 215755, 431510, 863020, 11089807, 22179614, 44359228, 55449035, 110898070, 221796140]

約数ペア:

[(1, 221796140), (2, 110898070), (4, 55449035), (5, 44359228), (10, 22179614), (20, 11089807), (257, 863020), (514, 431510), (1028, 215755), (1285, 172604), (2570, 86302), (5140, 43151)]