21357765

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{3319}}^1$

素因数の和:3354

約数の個数: 48

約数和(自身を含む): 43505280

約数和(自身を除く): 22147515

約数列:

[1, 3, 5, 9, 11, 13, 15, 33, 39, 45, 55, 65, 99, 117, 143, 165, 195, 429, 495, 585, 715, 1287, 2145, 3319, 6435, 9957, 16595, 29871, 36509, 43147, 49785, 109527, 129441, 149355, 182545, 215735, 328581, 388323, 474617, 547635, 647205, 1423851, 1642905, 1941615, 2373085, 4271553, 7119255, 21357765]

約数ペア:

[(1, 21357765), (3, 7119255), (5, 4271553), (9, 2373085), (11, 1941615), (13, 1642905), (15, 1423851), (33, 647205), (39, 547635), (45, 474617), (55, 388323), (65, 328581), (99, 215735), (117, 182545), (143, 149355), (165, 129441), (195, 109527), (429, 49785), (495, 43147), (585, 36509), (715, 29871), (1287, 16595), (2145, 9957), (3319, 6435)]