21521295

素因数分解:

$3^5\times 5^1\times {\mathrm{17713}}^1$

素因数の和:17733

約数の個数: 24

約数和(自身を含む): 38687376

約数和(自身を除く): 17166081

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17713, 53139, 88565, 159417, 265695, 478251, 797085, 1434753, 2391255, 4304259, 7173765, 21521295]

約数ペア:

[(1, 21521295), (3, 7173765), (5, 4304259), (9, 2391255), (15, 1434753), (27, 797085), (45, 478251), (81, 265695), (135, 159417), (243, 88565), (405, 53139), (1215, 17713)]