21201505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{439}}^1\times {\mathrm{743}}^1$

素因数の和:1200

約数の個数: 16

約数和(自身を含む): 27498240

約数和(自身を除く): 6296735

約数列:

[1, 5, 13, 65, 439, 743, 2195, 3715, 5707, 9659, 28535, 48295, 326177, 1630885, 4240301, 21201505]

約数ペア:

[(1, 21201505), (5, 4240301), (13, 1630885), (65, 326177), (439, 48295), (743, 28535), (2195, 9659), (3715, 5707)]