28112420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1279}}^1$

素因数の和:1452

約数の個数: 48

約数和(自身を含む): 67952640

約数和(自身を除く): 39840220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 1099, 1279, 1570, 2198, 2558, 3140, 4396, 5116, 5495, 6395, 8953, 10990, 12790, 17906, 21980, 25580, 35812, 44765, 89530, 179060, 200803, 401606, 803212, 1004015, 1405621, 2008030, 2811242, 4016060, 5622484, 7028105, 14056210, 28112420]

約数ペア:

[(1, 28112420), (2, 14056210), (4, 7028105), (5, 5622484), (7, 4016060), (10, 2811242), (14, 2008030), (20, 1405621), (28, 1004015), (35, 803212), (70, 401606), (140, 200803), (157, 179060), (314, 89530), (628, 44765), (785, 35812), (1099, 25580), (1279, 21980), (1570, 17906), (2198, 12790), (2558, 10990), (3140, 8953), (4396, 6395), (5116, 5495)]