81320005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{9851}}^1$

素因数の和:9996

約数の個数: 16

約数和(自身を含む): 105928704

約数和(自身を除く): 24608699

約数列:

[1, 5, 13, 65, 127, 635, 1651, 8255, 9851, 49255, 128063, 640315, 1251077, 6255385, 16264001, 81320005]

約数ペア:

[(1, 81320005), (5, 16264001), (13, 6255385), (65, 1251077), (127, 640315), (635, 128063), (1651, 49255), (8255, 9851)]