21717495

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 17594505

約数列:

[1, 3, 5, 9, 15, 41, 45, 79, 123, 149, 205, 237, 369, 395, 447, 615, 711, 745, 1185, 1341, 1845, 2235, 3239, 3555, 6109, 6705, 9717, 11771, 16195, 18327, 29151, 30545, 35313, 48585, 54981, 58855, 91635, 105939, 145755, 176565, 274905, 482611, 529695, 1447833, 2413055, 4343499, 7239165, 21717495]

約数ペア:

[(1, 21717495), (3, 7239165), (5, 4343499), (9, 2413055), (15, 1447833), (41, 529695), (45, 482611), (79, 274905), (123, 176565), (149, 145755), (205, 105939), (237, 91635), (369, 58855), (395, 54981), (447, 48585), (615, 35313), (711, 30545), (745, 29151), (1185, 18327), (1341, 16195), (1845, 11771), (2235, 9717), (3239, 6705), (3555, 6109)]