20157963

素因数分解:

$3^1\times 7^2\times {\mathrm{241}}^1\times {\mathrm{569}}^1$

素因数の和:827

約数の個数: 24

約数和(自身を含む): 31450320

約数和(自身を除く): 11292357

約数列:

[1, 3, 7, 21, 49, 147, 241, 569, 723, 1687, 1707, 3983, 5061, 11809, 11949, 27881, 35427, 83643, 137129, 411387, 959903, 2879709, 6719321, 20157963]

約数ペア:

[(1, 20157963), (3, 6719321), (7, 2879709), (21, 959903), (49, 411387), (147, 137129), (241, 83643), (569, 35427), (723, 27881), (1687, 11949), (1707, 11809), (3983, 5061)]