18720872

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{659}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 36352800

約数和(自身を除く): 17631928

約数列:

[1, 2, 4, 8, 53, 67, 106, 134, 212, 268, 424, 536, 659, 1318, 2636, 3551, 5272, 7102, 14204, 28408, 34927, 44153, 69854, 88306, 139708, 176612, 279416, 353224, 2340109, 4680218, 9360436, 18720872]

約数ペア:

[(1, 18720872), (2, 9360436), (4, 4680218), (8, 2340109), (53, 353224), (67, 279416), (106, 176612), (134, 139708), (212, 88306), (268, 69854), (424, 44153), (536, 34927), (659, 28408), (1318, 14204), (2636, 7102), (3551, 5272)]