20878155

素因数分解:

$3^4\times 5^1\times {\mathrm{51551}}^1$

素因数の和:51568

約数の個数: 20

約数和(自身を含む): 37426752

約数和(自身を除く): 16548597

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51551, 154653, 257755, 463959, 773265, 1391877, 2319795, 4175631, 6959385, 20878155]

約数ペア:

[(1, 20878155), (3, 6959385), (5, 4175631), (9, 2319795), (15, 1391877), (27, 773265), (45, 463959), (81, 257755), (135, 154653), (405, 51551)]