19905977

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{397}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 26745600

約数和(自身を除く): 6839623

約数列:

[1, 7, 13, 19, 29, 91, 133, 203, 247, 377, 397, 551, 1729, 2639, 2779, 3857, 5161, 7163, 7543, 11513, 36127, 50141, 52801, 80591, 98059, 149669, 218747, 686413, 1047683, 1531229, 2843711, 19905977]

約数ペア:

[(1, 19905977), (7, 2843711), (13, 1531229), (19, 1047683), (29, 686413), (91, 218747), (133, 149669), (203, 98059), (247, 80591), (377, 52801), (397, 50141), (551, 36127), (1729, 11513), (2639, 7543), (2779, 7163), (3857, 5161)]