217809315

素因数分解:

$3^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{7481}}^1$

素因数の和:8139

約数の個数: 24

約数和(自身を含む): 378170208

約数和(自身を除く): 160360893

約数列:

[1, 3, 5, 9, 15, 45, 647, 1941, 3235, 5823, 7481, 9705, 22443, 29115, 37405, 67329, 112215, 336645, 4840207, 14520621, 24201035, 43561863, 72603105, 217809315]

約数ペア:

[(1, 217809315), (3, 72603105), (5, 43561863), (9, 24201035), (15, 14520621), (45, 4840207), (647, 336645), (1941, 112215), (3235, 67329), (5823, 37405), (7481, 29115), (9705, 22443)]