21079175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{821}}^1$

素因数の和:923

約数の個数: 24

約数和(自身を含む): 28539840

約数和(自身を除く): 7460665

約数列:

[1, 5, 13, 25, 65, 79, 325, 395, 821, 1027, 1975, 4105, 5135, 10673, 20525, 25675, 53365, 64859, 266825, 324295, 843167, 1621475, 4215835, 21079175]

約数ペア:

[(1, 21079175), (5, 4215835), (13, 1621475), (25, 843167), (65, 324295), (79, 266825), (325, 64859), (395, 53365), (821, 25675), (1027, 20525), (1975, 10673), (4105, 5135)]