18451640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11251}}^1$

素因数の和:11303

約数の個数: 32

約数和(自身を含む): 42532560

約数和(自身を除く): 24080920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11251, 22502, 45004, 56255, 90008, 112510, 225020, 450040, 461291, 922582, 1845164, 2306455, 3690328, 4612910, 9225820, 18451640]

約数ペア:

[(1, 18451640), (2, 9225820), (4, 4612910), (5, 3690328), (8, 2306455), (10, 1845164), (20, 922582), (40, 461291), (41, 450040), (82, 225020), (164, 112510), (205, 90008), (328, 56255), (410, 45004), (820, 22502), (1640, 11251)]