18781009

素因数分解:

${\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1607}}^1$

素因数の和:1680

約数の個数: 16

約数和(自身を含む): 21611520

約数和(自身を除く): 2830511

約数列:

[1, 13, 29, 31, 377, 403, 899, 1607, 11687, 20891, 46603, 49817, 605839, 647621, 1444693, 18781009]

約数ペア:

[(1, 18781009), (13, 1444693), (29, 647621), (31, 605839), (377, 49817), (403, 46603), (899, 20891), (1607, 11687)]