18181009

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{379}}^1$

素因数の和:493

約数の個数: 24

約数和(自身を含む): 23392800

約数和(自身を除く): 5211791

約数列:

[1, 7, 11, 49, 77, 89, 379, 539, 623, 979, 2653, 4169, 4361, 6853, 18571, 29183, 33731, 47971, 204281, 236117, 371041, 1652819, 2597287, 18181009]

約数ペア:

[(1, 18181009), (7, 2597287), (11, 1652819), (49, 371041), (77, 236117), (89, 204281), (379, 47971), (539, 33731), (623, 29183), (979, 18571), (2653, 6853), (4169, 4361)]