81521245

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{18719}}^1$

素因数の和:18804

約数の個数: 16

約数和(自身を含む): 106928640

約数和(自身を除く): 25407395

約数列:

[1, 5, 13, 65, 67, 335, 871, 4355, 18719, 93595, 243347, 1216735, 1254173, 6270865, 16304249, 81521245]

約数ペア:

[(1, 81521245), (5, 16304249), (13, 6270865), (65, 1254173), (67, 1216735), (335, 243347), (871, 93595), (4355, 18719)]