81931240

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{5869}}^1$

素因数の和:6229

約数の個数: 32

約数和(自身を含む): 184905000

約数和(自身を除く): 102973760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1745, 2792, 3490, 5869, 6980, 11738, 13960, 23476, 29345, 46952, 58690, 117380, 234760, 2048281, 4096562, 8193124, 10241405, 16386248, 20482810, 40965620, 81931240]

約数ペア:

[(1, 81931240), (2, 40965620), (4, 20482810), (5, 16386248), (8, 10241405), (10, 8193124), (20, 4096562), (40, 2048281), (349, 234760), (698, 117380), (1396, 58690), (1745, 46952), (2792, 29345), (3490, 23476), (5869, 13960), (6980, 11738)]