21761145

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:235

約数の個数: 72

約数和(自身を含む): 44815680

約数和(自身を除く): 23054535

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 71, 105, 139, 147, 213, 245, 315, 355, 417, 441, 497, 639, 695, 735, 973, 1065, 1251, 1491, 2085, 2205, 2485, 2919, 3195, 3479, 4473, 4865, 6255, 6811, 7455, 8757, 9869, 10437, 14595, 17395, 20433, 22365, 29607, 31311, 34055, 43785, 49345, 52185, 61299, 69083, 88821, 102165, 148035, 156555, 207249, 306495, 345415, 444105, 483581, 621747, 1036245, 1450743, 2417905, 3108735, 4352229, 7253715, 21761145]

約数ペア:

[(1, 21761145), (3, 7253715), (5, 4352229), (7, 3108735), (9, 2417905), (15, 1450743), (21, 1036245), (35, 621747), (45, 483581), (49, 444105), (63, 345415), (71, 306495), (105, 207249), (139, 156555), (147, 148035), (213, 102165), (245, 88821), (315, 69083), (355, 61299), (417, 52185), (441, 49345), (497, 43785), (639, 34055), (695, 31311), (735, 29607), (973, 22365), (1065, 20433), (1251, 17395), (1491, 14595), (2085, 10437), (2205, 9869), (2485, 8757), (2919, 7455), (3195, 6811), (3479, 6255), (4473, 4865)]