21800779

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{751}}^1$

素因数の和:811

約数の個数: 32

約数和(自身を含む): 30320640

約数和(自身を除く): 8519861

約数列:

[1, 7, 11, 13, 29, 77, 91, 143, 203, 319, 377, 751, 1001, 2233, 2639, 4147, 5257, 8261, 9763, 21779, 29029, 57827, 68341, 107393, 152453, 239569, 283127, 751751, 1676983, 1981889, 3114397, 21800779]

約数ペア:

[(1, 21800779), (7, 3114397), (11, 1981889), (13, 1676983), (29, 751751), (77, 283127), (91, 239569), (143, 152453), (203, 107393), (319, 68341), (377, 57827), (751, 29029), (1001, 21779), (2233, 9763), (2639, 8261), (4147, 5257)]