21286060

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6779}}^1$

素因数の和:6945

約数の個数: 24

約数和(自身を含む): 44992080

約数和(自身を除く): 23706020

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6779, 13558, 27116, 33895, 67790, 135580, 1064303, 2128606, 4257212, 5321515, 10643030, 21286060]

約数ペア:

[(1, 21286060), (2, 10643030), (4, 5321515), (5, 4257212), (10, 2128606), (20, 1064303), (157, 135580), (314, 67790), (628, 33895), (785, 27116), (1570, 13558), (3140, 6779)]