20527720

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 48211200

約数和(自身を除く): 27683480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 61, 94, 122, 179, 188, 235, 244, 305, 358, 376, 470, 488, 610, 716, 895, 940, 1220, 1432, 1790, 1880, 2440, 2867, 3580, 5734, 7160, 8413, 10919, 11468, 14335, 16826, 21838, 22936, 28670, 33652, 42065, 43676, 54595, 57340, 67304, 84130, 87352, 109190, 114680, 168260, 218380, 336520, 436760, 513193, 1026386, 2052772, 2565965, 4105544, 5131930, 10263860, 20527720]

約数ペア:

[(1, 20527720), (2, 10263860), (4, 5131930), (5, 4105544), (8, 2565965), (10, 2052772), (20, 1026386), (40, 513193), (47, 436760), (61, 336520), (94, 218380), (122, 168260), (179, 114680), (188, 109190), (235, 87352), (244, 84130), (305, 67304), (358, 57340), (376, 54595), (470, 43676), (488, 42065), (610, 33652), (716, 28670), (895, 22936), (940, 21838), (1220, 16826), (1432, 14335), (1790, 11468), (1880, 10919), (2440, 8413), (2867, 7160), (3580, 5734)]