20512247240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1\times {\mathrm{1151}}^1$

素因数の和:1491

約数の個数: 128

約数和(自身を含む): 49268736000

約数和(自身を除く): 28756488760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 131, 152, 179, 190, 262, 358, 380, 524, 655, 716, 760, 895, 1048, 1151, 1310, 1432, 1790, 2302, 2489, 2620, 3401, 3580, 4604, 4978, 5240, 5755, 6802, 7160, 9208, 9956, 11510, 12445, 13604, 17005, 19912, 21869, 23020, 23449, 24890, 27208, 34010, 43738, 46040, 46898, 49780, 68020, 87476, 93796, 99560, 109345, 117245, 136040, 150781, 174952, 187592, 206029, 218690, 234490, 301562, 412058, 437380, 445531, 468980, 603124, 753905, 824116, 874760, 891062, 937960, 1030145, 1206248, 1507810, 1648232, 1782124, 2060290, 2227655, 2864839, 3015620, 3564248, 3914551, 4120580, 4455310, 5729678, 6031240, 7829102, 8241160, 8910620, 11459356, 14324195, 15658204, 17821240, 19572755, 22918712, 26989799, 28648390, 31316408, 39145510, 53979598, 57296780, 78291020, 107959196, 114593560, 134948995, 156582040, 215918392, 269897990, 512806181, 539795980, 1025612362, 1079591960, 2051224724, 2564030905, 4102449448, 5128061810, 10256123620, 20512247240]

約数ペア:

[(1, 20512247240), (2, 10256123620), (4, 5128061810), (5, 4102449448), (8, 2564030905), (10, 2051224724), (19, 1079591960), (20, 1025612362), (38, 539795980), (40, 512806181), (76, 269897990), (95, 215918392), (131, 156582040), (152, 134948995), (179, 114593560), (190, 107959196), (262, 78291020), (358, 57296780), (380, 53979598), (524, 39145510), (655, 31316408), (716, 28648390), (760, 26989799), (895, 22918712), (1048, 19572755), (1151, 17821240), (1310, 15658204), (1432, 14324195), (1790, 11459356), (2302, 8910620), (2489, 8241160), (2620, 7829102), (3401, 6031240), (3580, 5729678), (4604, 4455310), (4978, 4120580), (5240, 3914551), (5755, 3564248), (6802, 3015620), (7160, 2864839), (9208, 2227655), (9956, 2060290), (11510, 1782124), (12445, 1648232), (13604, 1507810), (17005, 1206248), (19912, 1030145), (21869, 937960), (23020, 891062), (23449, 874760), (24890, 824116), (27208, 753905), (34010, 603124), (43738, 468980), (46040, 445531), (46898, 437380), (49780, 412058), (68020, 301562), (87476, 234490), (93796, 218690), (99560, 206029), (109345, 187592), (117245, 174952), (136040, 150781)]