28657840

素因数分解:

$2^4\times 5^1\times {\mathrm{358223}}^1$

素因数の和:358236

約数の個数: 20

約数和(自身を含む): 66629664

約数和(自身を除く): 37971824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 358223, 716446, 1432892, 1791115, 2865784, 3582230, 5731568, 7164460, 14328920, 28657840]

約数ペア:

[(1, 28657840), (2, 14328920), (4, 7164460), (5, 5731568), (8, 3582230), (10, 2865784), (16, 1791115), (20, 1432892), (40, 716446), (80, 358223)]