21256516

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{389}}^1\times {\mathrm{719}}^1$

素因数の和:1131

約数の個数: 24

約数和(自身を含む): 39312000

約数和(自身を除く): 18055484

約数列:

[1, 2, 4, 19, 38, 76, 389, 719, 778, 1438, 1556, 2876, 7391, 13661, 14782, 27322, 29564, 54644, 279691, 559382, 1118764, 5314129, 10628258, 21256516]

約数ペア:

[(1, 21256516), (2, 10628258), (4, 5314129), (19, 1118764), (38, 559382), (76, 279691), (389, 54644), (719, 29564), (778, 27322), (1438, 14782), (1556, 13661), (2876, 7391)]