639436

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{557}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 1312416

約数和(自身を除く): 672980

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 557, 574, 1114, 1148, 2228, 3899, 7798, 15596, 22837, 45674, 91348, 159859, 319718, 639436]

約数ペア:

[(1, 639436), (2, 319718), (4, 159859), (7, 91348), (14, 45674), (28, 22837), (41, 15596), (82, 7798), (164, 3899), (287, 2228), (557, 1148), (574, 1114)]