81581540

素因数分解:

$2^2\times 5^1\times {\mathrm{1129}}^1\times {\mathrm{3613}}^1$

素因数の和:4751

約数の個数: 24

約数和(自身を含む): 171520440

約数和(自身を除く): 89938900

約数列:

[1, 2, 4, 5, 10, 20, 1129, 2258, 3613, 4516, 5645, 7226, 11290, 14452, 18065, 22580, 36130, 72260, 4079077, 8158154, 16316308, 20395385, 40790770, 81581540]

約数ペア:

[(1, 81581540), (2, 40790770), (4, 20395385), (5, 16316308), (10, 8158154), (20, 4079077), (1129, 72260), (2258, 36130), (3613, 22580), (4516, 18065), (5645, 14452), (7226, 11290)]