40640680

素因数分解:

$2^3\times 5^1\times {\mathrm{787}}^1\times {\mathrm{1291}}^1$

素因数の和:2089

約数の個数: 32

約数和(自身を含む): 91628640

約数和(自身を除く): 50987960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 787, 1291, 1574, 2582, 3148, 3935, 5164, 6296, 6455, 7870, 10328, 12910, 15740, 25820, 31480, 51640, 1016017, 2032034, 4064068, 5080085, 8128136, 10160170, 20320340, 40640680]

約数ペア:

[(1, 40640680), (2, 20320340), (4, 10160170), (5, 8128136), (8, 5080085), (10, 4064068), (20, 2032034), (40, 1016017), (787, 51640), (1291, 31480), (1574, 25820), (2582, 15740), (3148, 12910), (3935, 10328), (5164, 7870), (6296, 6455)]