19964560

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{463}}^1$

素因数の和:501

約数の個数: 120

約数和(自身を含む): 59031936

約数和(自身を除く): 39067376

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 176, 196, 220, 245, 280, 308, 385, 392, 440, 463, 490, 539, 560, 616, 770, 784, 880, 926, 980, 1078, 1232, 1540, 1852, 1960, 2156, 2315, 2695, 3080, 3241, 3704, 3920, 4312, 4630, 5093, 5390, 6160, 6482, 7408, 8624, 9260, 10186, 10780, 12964, 16205, 18520, 20372, 21560, 22687, 25465, 25928, 32410, 35651, 37040, 40744, 43120, 45374, 50930, 51856, 64820, 71302, 81488, 90748, 101860, 113435, 129640, 142604, 178255, 181496, 203720, 226870, 249557, 259280, 285208, 356510, 362992, 407440, 453740, 499114, 570416, 713020, 907480, 998228, 1247785, 1426040, 1814960, 1996456, 2495570, 2852080, 3992912, 4991140, 9982280, 19964560]

約数ペア:

[(1, 19964560), (2, 9982280), (4, 4991140), (5, 3992912), (7, 2852080), (8, 2495570), (10, 1996456), (11, 1814960), (14, 1426040), (16, 1247785), (20, 998228), (22, 907480), (28, 713020), (35, 570416), (40, 499114), (44, 453740), (49, 407440), (55, 362992), (56, 356510), (70, 285208), (77, 259280), (80, 249557), (88, 226870), (98, 203720), (110, 181496), (112, 178255), (140, 142604), (154, 129640), (176, 113435), (196, 101860), (220, 90748), (245, 81488), (280, 71302), (308, 64820), (385, 51856), (392, 50930), (440, 45374), (463, 43120), (490, 40744), (539, 37040), (560, 35651), (616, 32410), (770, 25928), (784, 25465), (880, 22687), (926, 21560), (980, 20372), (1078, 18520), (1232, 16205), (1540, 12964), (1852, 10780), (1960, 10186), (2156, 9260), (2315, 8624), (2695, 7408), (3080, 6482), (3241, 6160), (3704, 5390), (3920, 5093), (4312, 4630)]