20821605

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{198301}}^1$

素因数の和:198316

約数の個数: 16

約数和(自身を含む): 38073984

約数和(自身を除く): 17252379

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 198301, 594903, 991505, 1388107, 2974515, 4164321, 6940535, 20821605]

約数ペア:

[(1, 20821605), (3, 6940535), (5, 4164321), (7, 2974515), (15, 1388107), (21, 991505), (35, 594903), (105, 198301)]