21303160

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1609}}^1$

素因数の和:1951

約数の個数: 32

約数和(自身を含む): 48106800

約数和(自身を除く): 26803640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1609, 1655, 2648, 3218, 3310, 6436, 6620, 8045, 12872, 13240, 16090, 32180, 64360, 532579, 1065158, 2130316, 2662895, 4260632, 5325790, 10651580, 21303160]

約数ペア:

[(1, 21303160), (2, 10651580), (4, 5325790), (5, 4260632), (8, 2662895), (10, 2130316), (20, 1065158), (40, 532579), (331, 64360), (662, 32180), (1324, 16090), (1609, 13240), (1655, 12872), (2648, 8045), (3218, 6620), (3310, 6436)]