21565215

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{307}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 43051008

約数和(自身を除く): 21485793

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 223, 307, 315, 669, 921, 1115, 1535, 1561, 2007, 2149, 2763, 3345, 4605, 4683, 6447, 7805, 10035, 10745, 13815, 14049, 19341, 23415, 32235, 68461, 70245, 96705, 205383, 342305, 479227, 616149, 1026915, 1437681, 2396135, 3080745, 4313043, 7188405, 21565215]

約数ペア:

[(1, 21565215), (3, 7188405), (5, 4313043), (7, 3080745), (9, 2396135), (15, 1437681), (21, 1026915), (35, 616149), (45, 479227), (63, 342305), (105, 205383), (223, 96705), (307, 70245), (315, 68461), (669, 32235), (921, 23415), (1115, 19341), (1535, 14049), (1561, 13815), (2007, 10745), (2149, 10035), (2763, 7805), (3345, 6447), (4605, 4683)]