20784830990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{6247}}^1$

素因数の和:6450

約数の個数: 128

約数和(自身を含む): 48584448000

約数和(自身を除く): 27799617010

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 29, 35, 55, 58, 70, 77, 110, 145, 149, 154, 203, 290, 298, 319, 385, 406, 638, 745, 770, 1015, 1043, 1490, 1595, 1639, 2030, 2086, 2233, 3190, 3278, 4321, 4466, 5215, 6247, 8195, 8642, 10430, 11165, 11473, 12494, 16390, 21605, 22330, 22946, 30247, 31235, 43210, 43729, 47531, 57365, 60494, 62470, 68717, 87458, 95062, 114730, 137434, 151235, 181163, 218645, 237655, 302470, 332717, 343585, 362326, 437290, 475310, 481019, 665434, 687170, 905815, 930803, 962038, 1268141, 1663585, 1811630, 1861606, 1992793, 2405095, 2536282, 3327170, 3985586, 4654015, 4810190, 6340705, 6515621, 9308030, 9963965, 10238833, 12681410, 13031242, 13949551, 19927930, 20477666, 26993287, 27899102, 32578105, 51194165, 53986574, 65156210, 69747755, 71671831, 102388330, 134966435, 139495510, 143343662, 188953009, 269932870, 296926157, 358359155, 377906018, 593852314, 716718310, 944765045, 1484630785, 1889530090, 2078483099, 2969261570, 4156966198, 10392415495, 20784830990]

約数ペア:

[(1, 20784830990), (2, 10392415495), (5, 4156966198), (7, 2969261570), (10, 2078483099), (11, 1889530090), (14, 1484630785), (22, 944765045), (29, 716718310), (35, 593852314), (55, 377906018), (58, 358359155), (70, 296926157), (77, 269932870), (110, 188953009), (145, 143343662), (149, 139495510), (154, 134966435), (203, 102388330), (290, 71671831), (298, 69747755), (319, 65156210), (385, 53986574), (406, 51194165), (638, 32578105), (745, 27899102), (770, 26993287), (1015, 20477666), (1043, 19927930), (1490, 13949551), (1595, 13031242), (1639, 12681410), (2030, 10238833), (2086, 9963965), (2233, 9308030), (3190, 6515621), (3278, 6340705), (4321, 4810190), (4466, 4654015), (5215, 3985586), (6247, 3327170), (8195, 2536282), (8642, 2405095), (10430, 1992793), (11165, 1861606), (11473, 1811630), (12494, 1663585), (16390, 1268141), (21605, 962038), (22330, 930803), (22946, 905815), (30247, 687170), (31235, 665434), (43210, 481019), (43729, 475310), (47531, 437290), (57365, 362326), (60494, 343585), (62470, 332717), (68717, 302470), (87458, 237655), (95062, 218645), (114730, 181163), (137434, 151235)]