21881295

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28603}}^1$

素因数の和:28631

約数の個数: 24

約数和(自身を含む): 40160016

約数和(自身を除く): 18278721

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28603, 85809, 143015, 257427, 429045, 486251, 1287135, 1458753, 2431255, 4376259, 7293765, 21881295]

約数ペア:

[(1, 21881295), (3, 7293765), (5, 4376259), (9, 2431255), (15, 1458753), (17, 1287135), (45, 486251), (51, 429045), (85, 257427), (153, 143015), (255, 85809), (765, 28603)]