20078049340

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{262321}}^1$

素因数の和:262462

約数の個数: 48

約数和(自身を含む): 43629395040

約数和(自身を除く): 23551345700

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 89, 172, 178, 215, 356, 430, 445, 860, 890, 1780, 3827, 7654, 15308, 19135, 38270, 76540, 262321, 524642, 1049284, 1311605, 2623210, 5246420, 11279803, 22559606, 23346569, 45119212, 46693138, 56399015, 93386276, 112798030, 116732845, 225596060, 233465690, 466931380, 1003902467, 2007804934, 4015609868, 5019512335, 10039024670, 20078049340]

約数ペア:

[(1, 20078049340), (2, 10039024670), (4, 5019512335), (5, 4015609868), (10, 2007804934), (20, 1003902467), (43, 466931380), (86, 233465690), (89, 225596060), (172, 116732845), (178, 112798030), (215, 93386276), (356, 56399015), (430, 46693138), (445, 45119212), (860, 23346569), (890, 22559606), (1780, 11279803), (3827, 5246420), (7654, 2623210), (15308, 1311605), (19135, 1049284), (38270, 524642), (76540, 262321)]