890251640

素因数分解:

$2^3\times 5^1\times {\mathrm{971}}^1\times {\mathrm{22921}}^1$

素因数の和:23903

約数の個数: 32

約数和(自身を含む): 2005216560

約数和(自身を除く): 1114964920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 971, 1942, 3884, 4855, 7768, 9710, 19420, 22921, 38840, 45842, 91684, 114605, 183368, 229210, 458420, 916840, 22256291, 44512582, 89025164, 111281455, 178050328, 222562910, 445125820, 890251640]

約数ペア:

[(1, 890251640), (2, 445125820), (4, 222562910), (5, 178050328), (8, 111281455), (10, 89025164), (20, 44512582), (40, 22256291), (971, 916840), (1942, 458420), (3884, 229210), (4855, 183368), (7768, 114605), (9710, 91684), (19420, 45842), (22921, 38840)]