397995025

素因数分解:

$5^2\times {\mathrm{199}}^1\times {\mathrm{79999}}^1$

素因数の和:80208

約数の個数: 12

約数和(自身を含む): 496000000

約数和(自身を除く): 98004975

約数列:

[1, 5, 25, 199, 995, 4975, 79999, 399995, 1999975, 15919801, 79599005, 397995025]

約数ペア:

[(1, 397995025), (5, 79599005), (25, 15919801), (199, 1999975), (995, 399995), (4975, 79999)]