21259745

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{6959}}^1$

素因数の和:7024

約数の個数: 16

約数和(自身を含む): 28062720

約数和(自身を除く): 6802975

約数列:

[1, 5, 13, 47, 65, 235, 611, 3055, 6959, 34795, 90467, 327073, 452335, 1635365, 4251949, 21259745]

約数ペア:

[(1, 21259745), (5, 4251949), (13, 1635365), (47, 452335), (65, 327073), (235, 90467), (611, 34795), (3055, 6959)]