20309965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{7621}}^1$

素因数の和:7680

約数の個数: 16

約数和(自身を含む): 26890416

約数和(自身を除く): 6580451

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 7621, 38105, 99073, 312461, 495365, 1562305, 4061993, 20309965]

約数ペア:

[(1, 20309965), (5, 4061993), (13, 1562305), (41, 495365), (65, 312461), (205, 99073), (533, 38105), (2665, 7621)]