21081145

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{823}}^1$

素因数の和:984

約数の個数: 16

約数和(自身を含む): 26104320

約数和(自身を除く): 5023175

約数列:

[1, 5, 47, 109, 235, 545, 823, 4115, 5123, 25615, 38681, 89707, 193405, 448535, 4216229, 21081145]

約数ペア:

[(1, 21081145), (5, 4216229), (47, 448535), (109, 193405), (235, 89707), (545, 38681), (823, 25615), (4115, 5123)]