28438100

素因数分解:

$2^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{2609}}^1$

素因数の和:2732

約数の個数: 36

約数和(自身を含む): 62300700

約数和(自身を除く): 33862600

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 109, 218, 436, 545, 1090, 2180, 2609, 2725, 5218, 5450, 10436, 10900, 13045, 26090, 52180, 65225, 130450, 260900, 284381, 568762, 1137524, 1421905, 2843810, 5687620, 7109525, 14219050, 28438100]

約数ペア:

[(1, 28438100), (2, 14219050), (4, 7109525), (5, 5687620), (10, 2843810), (20, 1421905), (25, 1137524), (50, 568762), (100, 284381), (109, 260900), (218, 130450), (436, 65225), (545, 52180), (1090, 26090), (2180, 13045), (2609, 10900), (2725, 10436), (5218, 5450)]