21665565

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{223}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 40255488

約数和(自身を除く): 18589923

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 127, 153, 223, 255, 381, 635, 669, 765, 1115, 1143, 1905, 2007, 2159, 3345, 3791, 5715, 6477, 10035, 10795, 11373, 18955, 19431, 28321, 32385, 34119, 56865, 84963, 97155, 141605, 170595, 254889, 424815, 481457, 1274445, 1444371, 2407285, 4333113, 7221855, 21665565]

約数ペア:

[(1, 21665565), (3, 7221855), (5, 4333113), (9, 2407285), (15, 1444371), (17, 1274445), (45, 481457), (51, 424815), (85, 254889), (127, 170595), (153, 141605), (223, 97155), (255, 84963), (381, 56865), (635, 34119), (669, 32385), (765, 28321), (1115, 19431), (1143, 18955), (1905, 11373), (2007, 10795), (2159, 10035), (3345, 6477), (3791, 5715)]