20399071

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 26712576

約数和(自身を除く): 6313505

約数列:

[1, 7, 11, 43, 61, 77, 101, 301, 427, 473, 671, 707, 1111, 2623, 3311, 4343, 4697, 6161, 7777, 18361, 28853, 30401, 43127, 47773, 67771, 201971, 264923, 334411, 474397, 1854461, 2914153, 20399071]

約数ペア:

[(1, 20399071), (7, 2914153), (11, 1854461), (43, 474397), (61, 334411), (77, 264923), (101, 201971), (301, 67771), (427, 47773), (473, 43127), (671, 30401), (707, 28853), (1111, 18361), (2623, 7777), (3311, 6161), (4343, 4697)]