20815730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:255

約数の個数: 48

約数和(自身を含む): 41306760

約数和(自身を除く): 20491030

約数列:

[1, 2, 5, 10, 13, 26, 65, 109, 113, 130, 169, 218, 226, 338, 545, 565, 845, 1090, 1130, 1417, 1469, 1690, 2834, 2938, 7085, 7345, 12317, 14170, 14690, 18421, 19097, 24634, 36842, 38194, 61585, 92105, 95485, 123170, 160121, 184210, 190970, 320242, 800605, 1601210, 2081573, 4163146, 10407865, 20815730]

約数ペア:

[(1, 20815730), (2, 10407865), (5, 4163146), (10, 2081573), (13, 1601210), (26, 800605), (65, 320242), (109, 190970), (113, 184210), (130, 160121), (169, 123170), (218, 95485), (226, 92105), (338, 61585), (545, 38194), (565, 36842), (845, 24634), (1090, 19097), (1130, 18421), (1417, 14690), (1469, 14170), (1690, 12317), (2834, 7345), (2938, 7085)]