81814960

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{9929}}^1$

素因数の和:10045

約数の個数: 40

約数和(自身を含む): 192085920

約数和(自身を除く): 110270960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 4120, 8240, 9929, 19858, 39716, 49645, 79432, 99290, 158864, 198580, 397160, 794320, 1022687, 2045374, 4090748, 5113435, 8181496, 10226870, 16362992, 20453740, 40907480, 81814960]

約数ペア:

[(1, 81814960), (2, 40907480), (4, 20453740), (5, 16362992), (8, 10226870), (10, 8181496), (16, 5113435), (20, 4090748), (40, 2045374), (80, 1022687), (103, 794320), (206, 397160), (412, 198580), (515, 158864), (824, 99290), (1030, 79432), (1648, 49645), (2060, 39716), (4120, 19858), (8240, 9929)]