21097940

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{3187}}^1$

素因数の和:3527

約数の個数: 24

約数和(自身を含む): 44453472

約数和(自身を除く): 23355532

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3187, 3310, 6374, 6620, 12748, 15935, 31870, 63740, 1054897, 2109794, 4219588, 5274485, 10548970, 21097940]

約数ペア:

[(1, 21097940), (2, 10548970), (4, 5274485), (5, 4219588), (10, 2109794), (20, 1054897), (331, 63740), (662, 31870), (1324, 15935), (1655, 12748), (3187, 6620), (3310, 6374)]