20277257

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:509

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7591927

約数列:

[1, 7, 11, 13, 47, 77, 91, 143, 329, 431, 517, 611, 1001, 3017, 3619, 4277, 4741, 5603, 6721, 20257, 33187, 39221, 47047, 61633, 141799, 222827, 263341, 431431, 1559789, 1843387, 2896751, 20277257]

約数ペア:

[(1, 20277257), (7, 2896751), (11, 1843387), (13, 1559789), (47, 431431), (77, 263341), (91, 222827), (143, 141799), (329, 61633), (431, 47047), (517, 39221), (611, 33187), (1001, 20257), (3017, 6721), (3619, 5603), (4277, 4741)]