20783840

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{241}}^1$

素因数の和:281

約数の個数: 144

約数和(自身を含む): 62569584

約数和(自身を除く): 41785744

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 160, 176, 196, 220, 224, 241, 245, 280, 308, 352, 385, 392, 440, 482, 490, 539, 560, 616, 770, 784, 880, 964, 980, 1078, 1120, 1205, 1232, 1540, 1568, 1687, 1760, 1928, 1960, 2156, 2410, 2464, 2651, 2695, 3080, 3374, 3856, 3920, 4312, 4820, 5302, 5390, 6160, 6748, 7712, 7840, 8435, 8624, 9640, 10604, 10780, 11809, 12320, 13255, 13496, 16870, 17248, 18557, 19280, 21208, 21560, 23618, 26510, 26992, 33740, 37114, 38560, 42416, 43120, 47236, 53020, 53984, 59045, 67480, 74228, 84832, 86240, 92785, 94472, 106040, 118090, 129899, 134960, 148456, 185570, 188944, 212080, 236180, 259798, 269920, 296912, 371140, 377888, 424160, 472360, 519596, 593824, 649495, 742280, 944720, 1039192, 1298990, 1484560, 1889440, 2078384, 2597980, 2969120, 4156768, 5195960, 10391920, 20783840]

約数ペア:

[(1, 20783840), (2, 10391920), (4, 5195960), (5, 4156768), (7, 2969120), (8, 2597980), (10, 2078384), (11, 1889440), (14, 1484560), (16, 1298990), (20, 1039192), (22, 944720), (28, 742280), (32, 649495), (35, 593824), (40, 519596), (44, 472360), (49, 424160), (55, 377888), (56, 371140), (70, 296912), (77, 269920), (80, 259798), (88, 236180), (98, 212080), (110, 188944), (112, 185570), (140, 148456), (154, 134960), (160, 129899), (176, 118090), (196, 106040), (220, 94472), (224, 92785), (241, 86240), (245, 84832), (280, 74228), (308, 67480), (352, 59045), (385, 53984), (392, 53020), (440, 47236), (482, 43120), (490, 42416), (539, 38560), (560, 37114), (616, 33740), (770, 26992), (784, 26510), (880, 23618), (964, 21560), (980, 21208), (1078, 19280), (1120, 18557), (1205, 17248), (1232, 16870), (1540, 13496), (1568, 13255), (1687, 12320), (1760, 11809), (1928, 10780), (1960, 10604), (2156, 9640), (2410, 8624), (2464, 8435), (2651, 7840), (2695, 7712), (3080, 6748), (3374, 6160), (3856, 5390), (3920, 5302), (4312, 4820)]