20290640

素因数分解:

$2^4\times 5^1\times {\mathrm{253633}}^1$

素因数の和:253646

約数の個数: 20

約数和(自身を含む): 47175924

約数和(自身を除く): 26885284

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253633, 507266, 1014532, 1268165, 2029064, 2536330, 4058128, 5072660, 10145320, 20290640]

約数ペア:

[(1, 20290640), (2, 10145320), (4, 5072660), (5, 4058128), (8, 2536330), (10, 2029064), (16, 1268165), (20, 1014532), (40, 507266), (80, 253633)]