81787713

素因数分解:

$3^1\times 7^2\times {\mathrm{311}}^1\times {\mathrm{1789}}^1$

素因数の和:2117

約数の個数: 24

約数和(自身を含む): 127333440

約数和(自身を除く): 45545727

約数列:

[1, 3, 7, 21, 49, 147, 311, 933, 1789, 2177, 5367, 6531, 12523, 15239, 37569, 45717, 87661, 262983, 556379, 1669137, 3894653, 11683959, 27262571, 81787713]

約数ペア:

[(1, 81787713), (3, 27262571), (7, 11683959), (21, 3894653), (49, 1669137), (147, 556379), (311, 262983), (933, 87661), (1789, 45717), (2177, 37569), (5367, 15239), (6531, 12523)]