18900025

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:369

約数の個数: 24

約数和(自身を含む): 24552000

約数和(自身を除く): 5651975

約数列:

[1, 5, 25, 29, 131, 145, 199, 655, 725, 995, 3275, 3799, 4975, 5771, 18995, 26069, 28855, 94975, 130345, 144275, 651725, 756001, 3780005, 18900025]

約数ペア:

[(1, 18900025), (5, 3780005), (25, 756001), (29, 651725), (131, 144275), (145, 130345), (199, 94975), (655, 28855), (725, 26069), (995, 18995), (3275, 5771), (3799, 4975)]