399556

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:171

約数の個数: 24

約数和(自身を含む): 753984

約数和(自身を除く): 354428

約数列:

[1, 2, 4, 23, 43, 46, 86, 92, 101, 172, 202, 404, 989, 1978, 2323, 3956, 4343, 4646, 8686, 9292, 17372, 99889, 199778, 399556]

約数ペア:

[(1, 399556), (2, 199778), (4, 99889), (23, 17372), (43, 9292), (46, 8686), (86, 4646), (92, 4343), (101, 3956), (172, 2323), (202, 1978), (404, 989)]