18277880

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1151}}^1$

素因数の和:1559

約数の個数: 32

約数和(自身を含む): 41264640

約数和(自身を除く): 22986760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1151, 1588, 1985, 2302, 3176, 3970, 4604, 5755, 7940, 9208, 11510, 15880, 23020, 46040, 456947, 913894, 1827788, 2284735, 3655576, 4569470, 9138940, 18277880]

約数ペア:

[(1, 18277880), (2, 9138940), (4, 4569470), (5, 3655576), (8, 2284735), (10, 1827788), (20, 913894), (40, 456947), (397, 46040), (794, 23020), (1151, 15880), (1588, 11510), (1985, 9208), (2302, 7940), (3176, 5755), (3970, 4604)]