21000655216

素因数分解:

$2^4\times {\mathrm{479}}^1\times {\mathrm{2740169}}^1$

素因数の和:2740656

約数の個数: 20

約数和(自身を含む): 40773729600

約数和(自身を除く): 19773074384

約数列:

[1, 2, 4, 8, 16, 479, 958, 1916, 3832, 7664, 2740169, 5480338, 10960676, 21921352, 43842704, 1312540951, 2625081902, 5250163804, 10500327608, 21000655216]

約数ペア:

[(1, 21000655216), (2, 10500327608), (4, 5250163804), (8, 2625081902), (16, 1312540951), (479, 43842704), (958, 21921352), (1916, 10960676), (3832, 5480338), (7664, 2740169)]