21654855

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28307}}^1$

素因数の和:28335

約数の個数: 24

約数和(自身を含む): 39744432

約数和(自身を除く): 18089577

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28307, 84921, 141535, 254763, 424605, 481219, 1273815, 1443657, 2406095, 4330971, 7218285, 21654855]

約数ペア:

[(1, 21654855), (3, 7218285), (5, 4330971), (9, 2406095), (15, 1443657), (17, 1273815), (45, 481219), (51, 424605), (85, 254763), (153, 141535), (255, 84921), (765, 28307)]