21557984

素因数分解:

$2^5\times 7^1\times {\mathrm{157}}^1\times {\mathrm{613}}^1$

素因数の和:787

約数の個数: 48

約数和(自身を含む): 48894048

約数和(自身を除く): 27336064

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 157, 224, 314, 613, 628, 1099, 1226, 1256, 2198, 2452, 2512, 4291, 4396, 4904, 5024, 8582, 8792, 9808, 17164, 17584, 19616, 34328, 35168, 68656, 96241, 137312, 192482, 384964, 673687, 769928, 1347374, 1539856, 2694748, 3079712, 5389496, 10778992, 21557984]

約数ペア:

[(1, 21557984), (2, 10778992), (4, 5389496), (7, 3079712), (8, 2694748), (14, 1539856), (16, 1347374), (28, 769928), (32, 673687), (56, 384964), (112, 192482), (157, 137312), (224, 96241), (314, 68656), (613, 35168), (628, 34328), (1099, 19616), (1226, 17584), (1256, 17164), (2198, 9808), (2452, 8792), (2512, 8582), (4291, 5024), (4396, 4904)]