21000643216

素因数分解:

$2^4\times 7^1\times {\mathrm{187505743}}^1$

素因数の和:187505758

約数の個数: 20

約数和(自身を含む): 46501424512

約数和(自身を除く): 25500781296

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 187505743, 375011486, 750022972, 1312540201, 1500045944, 2625080402, 3000091888, 5250160804, 10500321608, 21000643216]

約数ペア:

[(1, 21000643216), (2, 10500321608), (4, 5250160804), (7, 3000091888), (8, 2625080402), (14, 1500045944), (16, 1312540201), (28, 750022972), (56, 375011486), (112, 187505743)]