18742760

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3371}}^1$

素因数の和:3521

約数の個数: 32

約数和(自身を含む): 42487200

約数和(自身を除く): 23744440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3371, 5560, 6742, 13484, 16855, 26968, 33710, 67420, 134840, 468569, 937138, 1874276, 2342845, 3748552, 4685690, 9371380, 18742760]

約数ペア:

[(1, 18742760), (2, 9371380), (4, 4685690), (5, 3748552), (8, 2342845), (10, 1874276), (20, 937138), (40, 468569), (139, 134840), (278, 67420), (556, 33710), (695, 26968), (1112, 16855), (1390, 13484), (2780, 6742), (3371, 5560)]