128772585

素因数分解:

$3^4\times 5^1\times {\mathrm{317957}}^1$

素因数の和:317974

約数の個数: 20

約数和(自身を含む): 230837508

約数和(自身を除く): 102064923

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 317957, 953871, 1589785, 2861613, 4769355, 8584839, 14308065, 25754517, 42924195, 128772585]

約数ペア:

[(1, 128772585), (3, 42924195), (5, 25754517), (9, 14308065), (15, 8584839), (27, 4769355), (45, 2861613), (81, 1589785), (135, 953871), (405, 317957)]