21124240

素因数分解:

$2^4\times 5^1\times {\mathrm{264053}}^1$

素因数の和:264066

約数の個数: 20

約数和(自身を含む): 49114044

約数和(自身を除く): 27989804

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264053, 528106, 1056212, 1320265, 2112424, 2640530, 4224848, 5281060, 10562120, 21124240]

約数ペア:

[(1, 21124240), (2, 10562120), (4, 5281060), (5, 4224848), (8, 2640530), (10, 2112424), (16, 1320265), (20, 1056212), (40, 528106), (80, 264053)]