644496040

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1\times {\mathrm{1021}}^1$

素因数の和:1442

約数の個数: 64

約数和(自身を含む): 1489340160

約数和(自身を除く): 844844120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 367, 430, 734, 860, 1021, 1468, 1720, 1835, 2042, 2936, 3670, 4084, 5105, 7340, 8168, 10210, 14680, 15781, 20420, 31562, 40840, 43903, 63124, 78905, 87806, 126248, 157810, 175612, 219515, 315620, 351224, 374707, 439030, 631240, 749414, 878060, 1498828, 1756120, 1873535, 2997656, 3747070, 7494140, 14988280, 16112401, 32224802, 64449604, 80562005, 128899208, 161124010, 322248020, 644496040]

約数ペア:

[(1, 644496040), (2, 322248020), (4, 161124010), (5, 128899208), (8, 80562005), (10, 64449604), (20, 32224802), (40, 16112401), (43, 14988280), (86, 7494140), (172, 3747070), (215, 2997656), (344, 1873535), (367, 1756120), (430, 1498828), (734, 878060), (860, 749414), (1021, 631240), (1468, 439030), (1720, 374707), (1835, 351224), (2042, 315620), (2936, 219515), (3670, 175612), (4084, 157810), (5105, 126248), (7340, 87806), (8168, 78905), (10210, 63124), (14680, 43903), (15781, 40840), (20420, 31562)]