20471440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{541}}^1$

素因数の和:608

約数の個数: 80

約数和(自身を含む): 53228736

約数和(自身を除く): 32757296

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 43, 44, 55, 80, 86, 88, 110, 172, 176, 215, 220, 344, 430, 440, 473, 541, 688, 860, 880, 946, 1082, 1720, 1892, 2164, 2365, 2705, 3440, 3784, 4328, 4730, 5410, 5951, 7568, 8656, 9460, 10820, 11902, 18920, 21640, 23263, 23804, 29755, 37840, 43280, 46526, 47608, 59510, 93052, 95216, 116315, 119020, 186104, 232630, 238040, 255893, 372208, 465260, 476080, 511786, 930520, 1023572, 1279465, 1861040, 2047144, 2558930, 4094288, 5117860, 10235720, 20471440]

約数ペア:

[(1, 20471440), (2, 10235720), (4, 5117860), (5, 4094288), (8, 2558930), (10, 2047144), (11, 1861040), (16, 1279465), (20, 1023572), (22, 930520), (40, 511786), (43, 476080), (44, 465260), (55, 372208), (80, 255893), (86, 238040), (88, 232630), (110, 186104), (172, 119020), (176, 116315), (215, 95216), (220, 93052), (344, 59510), (430, 47608), (440, 46526), (473, 43280), (541, 37840), (688, 29755), (860, 23804), (880, 23263), (946, 21640), (1082, 18920), (1720, 11902), (1892, 10820), (2164, 9460), (2365, 8656), (2705, 7568), (3440, 5951), (3784, 5410), (4328, 4730)]