20601475

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:351

約数の個数: 24

約数和(自身を含む): 26560800

約数和(自身を除く): 5959325

約数列:

[1, 5, 25, 41, 101, 199, 205, 505, 995, 1025, 2525, 4141, 4975, 8159, 20099, 20705, 40795, 100495, 103525, 203975, 502475, 824059, 4120295, 20601475]

約数ペア:

[(1, 20601475), (5, 4120295), (25, 824059), (41, 502475), (101, 203975), (199, 103525), (205, 100495), (505, 40795), (995, 20705), (1025, 20099), (2525, 8159), (4141, 4975)]