20512101520

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{571}}^1\times {\mathrm{1789}}^1$

素因数の和:2624

約数の個数: 80

約数和(自身を含む): 47991303360

約数和(自身を除く): 27479201840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 571, 1004, 1142, 1255, 1789, 2008, 2284, 2510, 2855, 3578, 4016, 4568, 5020, 5710, 7156, 8945, 9136, 10040, 11420, 14312, 17890, 20080, 22840, 28624, 35780, 45680, 71560, 143120, 143321, 286642, 449039, 573284, 716605, 898078, 1021519, 1146568, 1433210, 1796156, 2043038, 2245195, 2293136, 2866420, 3592312, 4086076, 4490390, 5107595, 5732840, 7184624, 8172152, 8980780, 10215190, 11465680, 16344304, 17961560, 20430380, 35923120, 40860760, 81721520, 256401269, 512802538, 1025605076, 1282006345, 2051210152, 2564012690, 4102420304, 5128025380, 10256050760, 20512101520]

約数ペア:

[(1, 20512101520), (2, 10256050760), (4, 5128025380), (5, 4102420304), (8, 2564012690), (10, 2051210152), (16, 1282006345), (20, 1025605076), (40, 512802538), (80, 256401269), (251, 81721520), (502, 40860760), (571, 35923120), (1004, 20430380), (1142, 17961560), (1255, 16344304), (1789, 11465680), (2008, 10215190), (2284, 8980780), (2510, 8172152), (2855, 7184624), (3578, 5732840), (4016, 5107595), (4568, 4490390), (5020, 4086076), (5710, 3592312), (7156, 2866420), (8945, 2293136), (9136, 2245195), (10040, 2043038), (11420, 1796156), (14312, 1433210), (17890, 1146568), (20080, 1021519), (22840, 898078), (28624, 716605), (35780, 573284), (45680, 449039), (71560, 286642), (143120, 143321)]