20501975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{317}}^1$

素因数の和:539

約数の個数: 24

約数和(自身を含む): 27602400

約数和(自身を除く): 7100425

約数列:

[1, 5, 13, 25, 65, 199, 317, 325, 995, 1585, 2587, 4121, 4975, 7925, 12935, 20605, 63083, 64675, 103025, 315415, 820079, 1577075, 4100395, 20501975]

約数ペア:

[(1, 20501975), (5, 4100395), (13, 1577075), (25, 820079), (65, 315415), (199, 103025), (317, 64675), (325, 63083), (995, 20605), (1585, 12935), (2587, 7925), (4121, 4975)]