18978705

素因数分解:

$3^4\times 5^1\times {\mathrm{46861}}^1$

素因数の和:46878

約数の個数: 20

約数和(自身を含む): 34021812

約数和(自身を除く): 15043107

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 46861, 140583, 234305, 421749, 702915, 1265247, 2108745, 3795741, 6326235, 18978705]

約数ペア:

[(1, 18978705), (3, 6326235), (5, 3795741), (9, 2108745), (15, 1265247), (27, 702915), (45, 421749), (81, 234305), (135, 140583), (405, 46861)]