20990988

素因数分解:

$2^2\times 3^4\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:173

約数の個数: 120

約数和(自身を含む): 60252192

約数和(自身を除く): 39261204

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 27, 34, 36, 37, 51, 54, 68, 74, 81, 102, 103, 108, 111, 148, 153, 162, 204, 206, 222, 306, 309, 324, 333, 412, 444, 459, 612, 618, 629, 666, 918, 927, 999, 1236, 1258, 1332, 1377, 1751, 1836, 1854, 1887, 1998, 2516, 2754, 2781, 2997, 3502, 3708, 3774, 3811, 3996, 5253, 5508, 5562, 5661, 5994, 7004, 7548, 7622, 8343, 10506, 11124, 11322, 11433, 11988, 15244, 15759, 16686, 16983, 21012, 22644, 22866, 31518, 33372, 33966, 34299, 45732, 47277, 50949, 63036, 64787, 67932, 68598, 94554, 101898, 102897, 129574, 137196, 141831, 189108, 194361, 203796, 205794, 259148, 283662, 308691, 388722, 411588, 567324, 583083, 617382, 777444, 1166166, 1234764, 1749249, 2332332, 3498498, 5247747, 6996996, 10495494, 20990988]

約数ペア:

[(1, 20990988), (2, 10495494), (3, 6996996), (4, 5247747), (6, 3498498), (9, 2332332), (12, 1749249), (17, 1234764), (18, 1166166), (27, 777444), (34, 617382), (36, 583083), (37, 567324), (51, 411588), (54, 388722), (68, 308691), (74, 283662), (81, 259148), (102, 205794), (103, 203796), (108, 194361), (111, 189108), (148, 141831), (153, 137196), (162, 129574), (204, 102897), (206, 101898), (222, 94554), (306, 68598), (309, 67932), (324, 64787), (333, 63036), (412, 50949), (444, 47277), (459, 45732), (612, 34299), (618, 33966), (629, 33372), (666, 31518), (918, 22866), (927, 22644), (999, 21012), (1236, 16983), (1258, 16686), (1332, 15759), (1377, 15244), (1751, 11988), (1836, 11433), (1854, 11322), (1887, 11124), (1998, 10506), (2516, 8343), (2754, 7622), (2781, 7548), (2997, 7004), (3502, 5994), (3708, 5661), (3774, 5562), (3811, 5508), (3996, 5253)]