213039505

素因数分解:

$5^1\times 7^2\times {\mathrm{521}}^1\times {\mathrm{1669}}^1$

素因数の和:2209

約数の個数: 24

約数和(自身を含む): 298135080

約数和(自身を除く): 85095575

約数列:

[1, 5, 7, 35, 49, 245, 521, 1669, 2605, 3647, 8345, 11683, 18235, 25529, 58415, 81781, 127645, 408905, 869549, 4347745, 6086843, 30434215, 42607901, 213039505]

約数ペア:

[(1, 213039505), (5, 42607901), (7, 30434215), (35, 6086843), (49, 4347745), (245, 869549), (521, 408905), (1669, 127645), (2605, 81781), (3647, 58415), (8345, 25529), (11683, 18235)]