181508980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1\times {\mathrm{599}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 388080000

約数和(自身を除く): 206571020

約数列:

[1, 2, 4, 5, 10, 20, 109, 139, 218, 278, 436, 545, 556, 599, 695, 1090, 1198, 1390, 2180, 2396, 2780, 2995, 5990, 11980, 15151, 30302, 60604, 65291, 75755, 83261, 130582, 151510, 166522, 261164, 303020, 326455, 333044, 416305, 652910, 832610, 1305820, 1665220, 9075449, 18150898, 36301796, 45377245, 90754490, 181508980]

約数ペア:

[(1, 181508980), (2, 90754490), (4, 45377245), (5, 36301796), (10, 18150898), (20, 9075449), (109, 1665220), (139, 1305820), (218, 832610), (278, 652910), (436, 416305), (545, 333044), (556, 326455), (599, 303020), (695, 261164), (1090, 166522), (1198, 151510), (1390, 130582), (2180, 83261), (2396, 75755), (2780, 65291), (2995, 60604), (5990, 30302), (11980, 15151)]