21420345

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20113}}^1$

素因数の和:20192

約数の個数: 16

約数和(自身を含む): 34756992

約数和(自身を除く): 13336647

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 20113, 60339, 100565, 301695, 1428023, 4284069, 7140115, 21420345]

約数ペア:

[(1, 21420345), (3, 7140115), (5, 4284069), (15, 1428023), (71, 301695), (213, 100565), (355, 60339), (1065, 20113)]