28201780

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{14537}}^1$

素因数の和:14643

約数の個数: 24

約数和(自身を含む): 59838408

約数和(自身を除く): 31636628

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 14537, 29074, 58148, 72685, 145370, 290740, 1410089, 2820178, 5640356, 7050445, 14100890, 28201780]

約数ペア:

[(1, 28201780), (2, 14100890), (4, 7050445), (5, 5640356), (10, 2820178), (20, 1410089), (97, 290740), (194, 145370), (388, 72685), (485, 58148), (970, 29074), (1940, 14537)]