20906977

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1427}}^1$

素因数の和:1477

約数の個数: 24

約数和(自身を含む): 27349056

約数和(自身を除く): 6442079

約数列:

[1, 7, 13, 23, 49, 91, 161, 299, 637, 1127, 1427, 2093, 9989, 14651, 18551, 32821, 69923, 129857, 229747, 426673, 908999, 1608229, 2986711, 20906977]

約数ペア:

[(1, 20906977), (7, 2986711), (13, 1608229), (23, 908999), (49, 426673), (91, 229747), (161, 129857), (299, 69923), (637, 32821), (1127, 18551), (1427, 14651), (2093, 9989)]