864220199240

素因数分解:

$2^3\times 5^1\times {\mathrm{21605504981}}^1$

素因数の和:21605504992

約数の個数: 16

約数和(自身を含む): 1944495448380

約数和(自身を除く): 1080275249140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 21605504981, 43211009962, 86422019924, 108027524905, 172844039848, 216055049810, 432110099620, 864220199240]

約数ペア:

[(1, 864220199240), (2, 432110099620), (4, 216055049810), (5, 172844039848), (8, 108027524905), (10, 86422019924), (20, 43211009962), (40, 21605504981)]