21273885

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27809}}^1$

素因数の和:27837

約数の個数: 24

約数和(自身を含む): 39045240

約数和(自身を除く): 17771355

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27809, 83427, 139045, 250281, 417135, 472753, 1251405, 1418259, 2363765, 4254777, 7091295, 21273885]

約数ペア:

[(1, 21273885), (3, 7091295), (5, 4254777), (9, 2363765), (15, 1418259), (17, 1251405), (45, 472753), (51, 417135), (85, 250281), (153, 139045), (255, 83427), (765, 27809)]