21305425

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{19819}}^1$

素因数の和:19872

約数の個数: 12

約数和(自身を含む): 27034480

約数和(自身を除く): 5729055

約数列:

[1, 5, 25, 43, 215, 1075, 19819, 99095, 495475, 852217, 4261085, 21305425]

約数ペア:

[(1, 21305425), (5, 4261085), (25, 852217), (43, 495475), (215, 99095), (1075, 19819)]