18908720

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3329}}^1$

素因数の和:3413

約数の個数: 40

約数和(自身を含む): 44595360

約数和(自身を除く): 25686640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3329, 5680, 6658, 13316, 16645, 26632, 33290, 53264, 66580, 133160, 236359, 266320, 472718, 945436, 1181795, 1890872, 2363590, 3781744, 4727180, 9454360, 18908720]

約数ペア:

[(1, 18908720), (2, 9454360), (4, 4727180), (5, 3781744), (8, 2363590), (10, 1890872), (16, 1181795), (20, 945436), (40, 472718), (71, 266320), (80, 236359), (142, 133160), (284, 66580), (355, 53264), (568, 33290), (710, 26632), (1136, 16645), (1420, 13316), (2840, 6658), (3329, 5680)]