21009716

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{57719}}^1$

素因数の和:57743

約数の個数: 24

約数和(自身を含む): 45252480

約数和(自身を除く): 24242764

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 364, 57719, 115438, 230876, 404033, 750347, 808066, 1500694, 1616132, 3001388, 5252429, 10504858, 21009716]

約数ペア:

[(1, 21009716), (2, 10504858), (4, 5252429), (7, 3001388), (13, 1616132), (14, 1500694), (26, 808066), (28, 750347), (52, 404033), (91, 230876), (182, 115438), (364, 57719)]