20700405

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 43130880

約数和(自身を除く): 22430475

約数列:

[1, 3, 5, 9, 11, 15, 19, 31, 33, 45, 55, 57, 71, 93, 95, 99, 155, 165, 171, 209, 213, 279, 285, 341, 355, 465, 495, 589, 627, 639, 781, 855, 1023, 1045, 1065, 1349, 1395, 1705, 1767, 1881, 2201, 2343, 2945, 3069, 3135, 3195, 3905, 4047, 5115, 5301, 6479, 6603, 6745, 7029, 8835, 9405, 11005, 11715, 12141, 14839, 15345, 19437, 19809, 20235, 24211, 26505, 32395, 33015, 35145, 41819, 44517, 58311, 60705, 72633, 74195, 97185, 99045, 121055, 125457, 133551, 209095, 217899, 222585, 291555, 363165, 376371, 460009, 627285, 667755, 1089495, 1380027, 1881855, 2300045, 4140081, 6900135, 20700405]

約数ペア:

[(1, 20700405), (3, 6900135), (5, 4140081), (9, 2300045), (11, 1881855), (15, 1380027), (19, 1089495), (31, 667755), (33, 627285), (45, 460009), (55, 376371), (57, 363165), (71, 291555), (93, 222585), (95, 217899), (99, 209095), (155, 133551), (165, 125457), (171, 121055), (209, 99045), (213, 97185), (279, 74195), (285, 72633), (341, 60705), (355, 58311), (465, 44517), (495, 41819), (589, 35145), (627, 33015), (639, 32395), (781, 26505), (855, 24211), (1023, 20235), (1045, 19809), (1065, 19437), (1349, 15345), (1395, 14839), (1705, 12141), (1767, 11715), (1881, 11005), (2201, 9405), (2343, 8835), (2945, 7029), (3069, 6745), (3135, 6603), (3195, 6479), (3905, 5301), (4047, 5115)]