20778499

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:319

約数の個数: 24

約数和(自身を含む): 25608960

約数和(自身を除く): 4830461

約数列:

[1, 7, 23, 49, 103, 161, 179, 721, 1127, 1253, 2369, 4117, 5047, 8771, 16583, 18437, 28819, 116081, 129059, 201733, 424051, 903413, 2968357, 20778499]

約数ペア:

[(1, 20778499), (7, 2968357), (23, 903413), (49, 424051), (103, 201733), (161, 129059), (179, 116081), (721, 28819), (1127, 18437), (1253, 16583), (2369, 8771), (4117, 5047)]