77890815

素因数分解:

$3^4\times 5^1\times {\mathrm{192323}}^1$

素因数の和:192340

約数の個数: 20

約数和(自身を含む): 139627224

約数和(自身を除く): 61736409

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 192323, 576969, 961615, 1730907, 2884845, 5192721, 8654535, 15578163, 25963605, 77890815]

約数ペア:

[(1, 77890815), (3, 25963605), (5, 15578163), (9, 8654535), (15, 5192721), (27, 2884845), (45, 1730907), (81, 961615), (135, 576969), (405, 192323)]