81863873

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{20921}}^1$

素因数の和:20984

約数の個数: 16

約数和(自身を含む): 103103616

約数和(自身を除く): 21239743

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 20921, 146447, 271973, 899603, 1903811, 6297221, 11694839, 81863873]

約数ペア:

[(1, 81863873), (7, 11694839), (13, 6297221), (43, 1903811), (91, 899603), (301, 271973), (559, 146447), (3913, 20921)]