20499575

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{419}}^1$

素因数の和:551

約数の個数: 24

約数和(自身を含む): 27081600

約数和(自身を除く): 6582025

約数列:

[1, 5, 19, 25, 95, 103, 419, 475, 515, 1957, 2095, 2575, 7961, 9785, 10475, 39805, 43157, 48925, 199025, 215785, 819983, 1078925, 4099915, 20499575]

約数ペア:

[(1, 20499575), (5, 4099915), (19, 1078925), (25, 819983), (95, 215785), (103, 199025), (419, 48925), (475, 43157), (515, 39805), (1957, 10475), (2095, 9785), (2575, 7961)]