20952155

素因数分解:

$5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:688

約数の個数: 32

約数和(自身を含む): 30912000

約数和(自身を除く): 9959845

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 343, 643, 665, 931, 1715, 3215, 4501, 4655, 6517, 12217, 22505, 31507, 32585, 61085, 85519, 157535, 220549, 427595, 598633, 1102745, 2993165, 4190431, 20952155]

約数ペア:

[(1, 20952155), (5, 4190431), (7, 2993165), (19, 1102745), (35, 598633), (49, 427595), (95, 220549), (133, 157535), (245, 85519), (343, 61085), (643, 32585), (665, 31507), (931, 22505), (1715, 12217), (3215, 6517), (4501, 4655)]