20671651

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 28159488

約数和(自身を除く): 7487837

約数列:

[1, 7, 11, 13, 77, 91, 107, 143, 193, 749, 1001, 1177, 1351, 1391, 2123, 2509, 8239, 9737, 14861, 15301, 17563, 20651, 27599, 107107, 144557, 193193, 227161, 268463, 1590127, 1879241, 2953093, 20671651]

約数ペア:

[(1, 20671651), (7, 2953093), (11, 1879241), (13, 1590127), (77, 268463), (91, 227161), (107, 193193), (143, 144557), (193, 107107), (749, 27599), (1001, 20651), (1177, 17563), (1351, 15301), (1391, 14861), (2123, 9737), (2509, 8239)]