21203147

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{701}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 25272000

約数和(自身を除く): 4068853

約数列:

[1, 7, 29, 149, 203, 701, 1043, 4321, 4907, 20329, 30247, 104449, 142303, 731143, 3029021, 21203147]

約数ペア:

[(1, 21203147), (7, 3029021), (29, 731143), (149, 142303), (203, 104449), (701, 30247), (1043, 20329), (4321, 4907)]