20904455

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^3\times {\mathrm{173}}^1$

素因数の和:228

約数の個数: 32

約数和(自身を含む): 29816640

約数和(自身を除く): 8912185

約数列:

[1, 5, 11, 13, 55, 65, 143, 169, 173, 715, 845, 865, 1859, 1903, 2197, 2249, 9295, 9515, 10985, 11245, 24167, 24739, 29237, 120835, 123695, 146185, 321607, 380081, 1608035, 1900405, 4180891, 20904455]

約数ペア:

[(1, 20904455), (5, 4180891), (11, 1900405), (13, 1608035), (55, 380081), (65, 321607), (143, 146185), (169, 123695), (173, 120835), (715, 29237), (845, 24739), (865, 24167), (1859, 11245), (1903, 10985), (2197, 9515), (2249, 9295)]