21214865

素因数分解:

$5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{1949}}^1$

素因数の和:2272

約数の個数: 16

約数和(自身を含む): 29203200

約数和(自身を除く): 7988335

約数列:

[1, 5, 7, 35, 311, 1555, 1949, 2177, 9745, 10885, 13643, 68215, 606139, 3030695, 4242973, 21214865]

約数ペア:

[(1, 21214865), (5, 4242973), (7, 3030695), (35, 606139), (311, 68215), (1555, 13643), (1949, 10885), (2177, 9745)]