31379439

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{839}}^1$

素因数の和:999

約数の個数: 32

約数和(自身を含む): 51932160

約数和(自身を除く): 20552721

約数列:

[1, 3, 7, 13, 21, 39, 91, 137, 273, 411, 839, 959, 1781, 2517, 2877, 5343, 5873, 10907, 12467, 17619, 32721, 37401, 76349, 114943, 229047, 344829, 804601, 1494259, 2413803, 4482777, 10459813, 31379439]

約数ペア:

[(1, 31379439), (3, 10459813), (7, 4482777), (13, 2413803), (21, 1494259), (39, 804601), (91, 344829), (137, 229047), (273, 114943), (411, 76349), (839, 37401), (959, 32721), (1781, 17619), (2517, 12467), (2877, 10907), (5343, 5873)]