21977305

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{1187}}^1$

素因数の和:1245

約数の個数: 24

約数和(自身を含む): 31534272

約数和(自身を除く): 9556967

約数列:

[1, 5, 7, 23, 35, 115, 161, 529, 805, 1187, 2645, 3703, 5935, 8309, 18515, 27301, 41545, 136505, 191107, 627923, 955535, 3139615, 4395461, 21977305]

約数ペア:

[(1, 21977305), (5, 4395461), (7, 3139615), (23, 955535), (35, 627923), (115, 191107), (161, 136505), (529, 41545), (805, 27301), (1187, 18515), (2645, 8309), (3703, 5935)]