21654133090

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30498779}}^1$

素因数の和:30498857

約数の個数: 16

約数和(自身を含む): 39526418880

約数和(自身を除く): 17872285790

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30498779, 60997558, 152493895, 304987790, 2165413309, 4330826618, 10827066545, 21654133090]

約数ペア:

[(1, 21654133090), (2, 10827066545), (5, 4330826618), (10, 2165413309), (71, 304987790), (142, 152493895), (355, 60997558), (710, 30498779)]