81904535

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{12143}}^1$

素因数の和:12238

約数の個数: 16

約数和(自身を含む): 104924160

約数和(自身を除く): 23019625

約数列:

[1, 5, 19, 71, 95, 355, 1349, 6745, 12143, 60715, 230717, 862153, 1153585, 4310765, 16380907, 81904535]

約数ペア:

[(1, 81904535), (5, 16380907), (19, 4310765), (71, 1153585), (95, 862153), (355, 230717), (1349, 60715), (6745, 12143)]