20154100

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^2\times {\mathrm{109}}^1$

素因数の和:209

約数の個数: 54

約数和(自身を含む): 45185910

約数和(自身を除く): 25031810

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 109, 172, 215, 218, 430, 436, 545, 860, 1075, 1090, 1849, 2150, 2180, 2725, 3698, 4300, 4687, 5450, 7396, 9245, 9374, 10900, 18490, 18748, 23435, 36980, 46225, 46870, 92450, 93740, 117175, 184900, 201541, 234350, 403082, 468700, 806164, 1007705, 2015410, 4030820, 5038525, 10077050, 20154100]

約数ペア:

[(1, 20154100), (2, 10077050), (4, 5038525), (5, 4030820), (10, 2015410), (20, 1007705), (25, 806164), (43, 468700), (50, 403082), (86, 234350), (100, 201541), (109, 184900), (172, 117175), (215, 93740), (218, 92450), (430, 46870), (436, 46225), (545, 36980), (860, 23435), (1075, 18748), (1090, 18490), (1849, 10900), (2150, 9374), (2180, 9245), (2725, 7396), (3698, 5450), (4300, 4687)]