20961265

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{829}}^1$

素因数の和:1236

約数の個数: 16

約数和(自身を含む): 27190800

約数和(自身を除く): 6229535

約数列:

[1, 5, 13, 65, 389, 829, 1945, 4145, 5057, 10777, 25285, 53885, 322481, 1612405, 4192253, 20961265]

約数ペア:

[(1, 20961265), (5, 4192253), (13, 1612405), (65, 322481), (389, 53885), (829, 25285), (1945, 10777), (4145, 5057)]