20498225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{569}}^1$

素因数の和:721

約数の個数: 24

約数和(自身を含む): 27989280

約数和(自身を除く): 7491055

約数列:

[1, 5, 11, 25, 55, 131, 275, 569, 655, 1441, 2845, 3275, 6259, 7205, 14225, 31295, 36025, 74539, 156475, 372695, 819929, 1863475, 4099645, 20498225]

約数ペア:

[(1, 20498225), (5, 4099645), (11, 1863475), (25, 819929), (55, 372695), (131, 156475), (275, 74539), (569, 36025), (655, 31295), (1441, 14225), (2845, 7205), (3275, 6259)]