28138670

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{401981}}^1$

素因数の和:401995

約数の個数: 16

約数和(自身を含む): 57885408

約数和(自身を除く): 29746738

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 401981, 803962, 2009905, 2813867, 4019810, 5627734, 14069335, 28138670]

約数ペア:

[(1, 28138670), (2, 14069335), (5, 5627734), (7, 4019810), (10, 2813867), (14, 2009905), (35, 803962), (70, 401981)]