21229515

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27751}}^1$

素因数の和:27779

約数の個数: 24

約数和(自身を含む): 38963808

約数和(自身を除く): 17734293

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27751, 83253, 138755, 249759, 416265, 471767, 1248795, 1415301, 2358835, 4245903, 7076505, 21229515]

約数ペア:

[(1, 21229515), (3, 7076505), (5, 4245903), (9, 2358835), (15, 1415301), (17, 1248795), (45, 471767), (51, 416265), (85, 249759), (153, 138755), (255, 83253), (765, 27751)]