21780255

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29633}}^1$

素因数の和:29655

約数の個数: 24

約数和(自身を含む): 40539312

約数和(自身を除く): 18759057

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 29633, 88899, 148165, 207431, 444495, 622293, 1037155, 1452017, 3111465, 4356051, 7260085, 21780255]

約数ペア:

[(1, 21780255), (3, 7260085), (5, 4356051), (7, 3111465), (15, 1452017), (21, 1037155), (35, 622293), (49, 444495), (105, 207431), (147, 148165), (245, 88899), (735, 29633)]