20529520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{569}}^1$

素因数の和:634

約数の個数: 80

約数和(自身を含む): 53434080

約数和(自身を除く): 32904560

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 569, 656, 820, 880, 902, 1138, 1640, 1804, 2255, 2276, 2845, 3280, 3608, 4510, 4552, 5690, 6259, 7216, 9020, 9104, 11380, 12518, 18040, 22760, 23329, 25036, 31295, 36080, 45520, 46658, 50072, 62590, 93316, 100144, 116645, 125180, 186632, 233290, 250360, 256619, 373264, 466580, 500720, 513238, 933160, 1026476, 1283095, 1866320, 2052952, 2566190, 4105904, 5132380, 10264760, 20529520]

約数ペア:

[(1, 20529520), (2, 10264760), (4, 5132380), (5, 4105904), (8, 2566190), (10, 2052952), (11, 1866320), (16, 1283095), (20, 1026476), (22, 933160), (40, 513238), (41, 500720), (44, 466580), (55, 373264), (80, 256619), (82, 250360), (88, 233290), (110, 186632), (164, 125180), (176, 116645), (205, 100144), (220, 93316), (328, 62590), (410, 50072), (440, 46658), (451, 45520), (569, 36080), (656, 31295), (820, 25036), (880, 23329), (902, 22760), (1138, 18040), (1640, 12518), (1804, 11380), (2255, 9104), (2276, 9020), (2845, 7216), (3280, 6259), (3608, 5690), (4510, 4552)]