21058455

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 18754665

約数列:

[1, 3, 5, 11, 15, 23, 31, 33, 55, 69, 93, 115, 155, 165, 179, 253, 341, 345, 465, 537, 713, 759, 895, 1023, 1265, 1705, 1969, 2139, 2685, 3565, 3795, 4117, 5115, 5549, 5907, 7843, 9845, 10695, 12351, 16647, 20585, 23529, 27745, 29535, 39215, 45287, 61039, 61755, 83235, 117645, 127627, 135861, 183117, 226435, 305195, 382881, 638135, 679305, 915585, 1403897, 1914405, 4211691, 7019485, 21058455]

約数ペア:

[(1, 21058455), (3, 7019485), (5, 4211691), (11, 1914405), (15, 1403897), (23, 915585), (31, 679305), (33, 638135), (55, 382881), (69, 305195), (93, 226435), (115, 183117), (155, 135861), (165, 127627), (179, 117645), (253, 83235), (341, 61755), (345, 61039), (465, 45287), (537, 39215), (713, 29535), (759, 27745), (895, 23529), (1023, 20585), (1265, 16647), (1705, 12351), (1969, 10695), (2139, 9845), (2685, 7843), (3565, 5907), (3795, 5549), (4117, 5115)]