28109140

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{3613}}^1$

素因数の和:4011

約数の個数: 24

約数和(自身を含む): 59197320

約数和(自身を除く): 31088180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3613, 3890, 7226, 7780, 14452, 18065, 36130, 72260, 1405457, 2810914, 5621828, 7027285, 14054570, 28109140]

約数ペア:

[(1, 28109140), (2, 14054570), (4, 7027285), (5, 5621828), (10, 2810914), (20, 1405457), (389, 72260), (778, 36130), (1556, 18065), (1945, 14452), (3613, 7780), (3890, 7226)]