18218885

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{839}}^1$

素因数の和:988

約数の個数: 16

約数和(自身を含む): 22619520

約数和(自身を除く): 4400635

約数列:

[1, 5, 43, 101, 215, 505, 839, 4195, 4343, 21715, 36077, 84739, 180385, 423695, 3643777, 18218885]

約数ペア:

[(1, 18218885), (5, 3643777), (43, 423695), (101, 180385), (215, 84739), (505, 36077), (839, 21715), (4195, 4343)]