81181009

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{163}}^1\times {\mathrm{421}}^1$

素因数の和:617

約数の個数: 24

約数和(自身を含む): 101320512

約数和(自身を除く): 20139503

約数列:

[1, 7, 13, 91, 163, 169, 421, 1141, 1183, 2119, 2947, 5473, 14833, 27547, 38311, 68623, 71149, 192829, 480361, 498043, 892099, 6244693, 11597287, 81181009]

約数ペア:

[(1, 81181009), (7, 11597287), (13, 6244693), (91, 892099), (163, 498043), (169, 480361), (421, 192829), (1141, 71149), (1183, 68623), (2119, 38311), (2947, 27547), (5473, 14833)]