81905607

素因数分解:

$3^3\times 7^2\times {\mathrm{61909}}^1$

素因数の和:61932

約数の個数: 24

約数和(自身を含む): 141154800

約数和(自身を除く): 59249193

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 61909, 185727, 433363, 557181, 1300089, 1671543, 3033541, 3900267, 9100623, 11700801, 27301869, 81905607]

約数ペア:

[(1, 81905607), (3, 27301869), (7, 11700801), (9, 9100623), (21, 3900267), (27, 3033541), (49, 1671543), (63, 1300089), (147, 557181), (189, 433363), (441, 185727), (1323, 61909)]