21751245

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28433}}^1$

素因数の和:28461

約数の個数: 24

約数和(自身を含む): 39921336

約数和(自身を除く): 18170091

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28433, 85299, 142165, 255897, 426495, 483361, 1279485, 1450083, 2416805, 4350249, 7250415, 21751245]

約数ペア:

[(1, 21751245), (3, 7250415), (5, 4350249), (9, 2416805), (15, 1450083), (17, 1279485), (45, 483361), (51, 426495), (85, 255897), (153, 142165), (255, 85299), (765, 28433)]