21217495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{449}}^1\times {\mathrm{727}}^1$

素因数の和:1194

約数の個数: 16

約数和(自身を含む): 27518400

約数和(自身を除く): 6300905

約数列:

[1, 5, 13, 65, 449, 727, 2245, 3635, 5837, 9451, 29185, 47255, 326423, 1632115, 4243499, 21217495]

約数ペア:

[(1, 21217495), (5, 4243499), (13, 1632115), (65, 326423), (449, 47255), (727, 29185), (2245, 9451), (3635, 5837)]