20201321

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{3203}}^1$

素因数の和:3280

約数の個数: 16

約数和(自身を含む): 24914304

約数和(自身を除く): 4712983

約数列:

[1, 7, 17, 53, 119, 371, 901, 3203, 6307, 22421, 54451, 169759, 381157, 1188313, 2885903, 20201321]

約数ペア:

[(1, 20201321), (7, 2885903), (17, 1188313), (53, 381157), (119, 169759), (371, 54451), (901, 22421), (3203, 6307)]