28087220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{439}}^1\times {\mathrm{457}}^1$

素因数の和:912

約数の個数: 48

約数和(自身を含む): 67710720

約数和(自身を除く): 39623500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 439, 457, 878, 914, 1756, 1828, 2195, 2285, 3073, 3199, 4390, 4570, 6146, 6398, 8780, 9140, 12292, 12796, 15365, 15995, 30730, 31990, 61460, 63980, 200623, 401246, 802492, 1003115, 1404361, 2006230, 2808722, 4012460, 5617444, 7021805, 14043610, 28087220]

約数ペア:

[(1, 28087220), (2, 14043610), (4, 7021805), (5, 5617444), (7, 4012460), (10, 2808722), (14, 2006230), (20, 1404361), (28, 1003115), (35, 802492), (70, 401246), (140, 200623), (439, 63980), (457, 61460), (878, 31990), (914, 30730), (1756, 15995), (1828, 15365), (2195, 12796), (2285, 12292), (3073, 9140), (3199, 8780), (4390, 6398), (4570, 6146)]