21805130

素因数分解:

$2^1\times 5^1\times {\mathrm{439}}^1\times {\mathrm{4967}}^1$

素因数の和:5413

約数の個数: 16

約数和(自身を含む): 39346560

約数和(自身を除く): 17541430

約数列:

[1, 2, 5, 10, 439, 878, 2195, 4390, 4967, 9934, 24835, 49670, 2180513, 4361026, 10902565, 21805130]

約数ペア:

[(1, 21805130), (2, 10902565), (5, 4361026), (10, 2180513), (439, 49670), (878, 24835), (2195, 9934), (4390, 4967)]