21691845

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{68863}}^1$

素因数の和:68881

約数の個数: 24

約数和(自身を含む): 42971136

約数和(自身を除く): 21279291

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 68863, 206589, 344315, 482041, 619767, 1032945, 1446123, 2410205, 3098835, 4338369, 7230615, 21691845]

約数ペア:

[(1, 21691845), (3, 7230615), (5, 4338369), (7, 3098835), (9, 2410205), (15, 1446123), (21, 1032945), (35, 619767), (45, 482041), (63, 344315), (105, 206589), (315, 68863)]