81909387

素因数分解:

$3^4\times 7^1\times {\mathrm{144461}}^1$

素因数の和:144480

約数の個数: 20

約数和(自身を含む): 139839216

約数和(自身を除く): 57929829

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 144461, 433383, 1011227, 1300149, 3033681, 3900447, 9101043, 11701341, 27303129, 81909387]

約数ペア:

[(1, 81909387), (3, 27303129), (7, 11701341), (9, 9101043), (21, 3900447), (27, 3033681), (63, 1300149), (81, 1011227), (189, 433383), (567, 144461)]