21955905

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15739}}^1$

素因数の和:15781

約数の個数: 24

約数和(自身を含む): 39287040

約数和(自身を除く): 17331135

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 15739, 47217, 78695, 141651, 236085, 487909, 708255, 1463727, 2439545, 4391181, 7318635, 21955905]

約数ペア:

[(1, 21955905), (3, 7318635), (5, 4391181), (9, 2439545), (15, 1463727), (31, 708255), (45, 487909), (93, 236085), (155, 141651), (279, 78695), (465, 47217), (1395, 15739)]