21375880

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{3089}}^1$

素因数の和:3273

約数の個数: 32

約数和(自身を含む): 48389400

約数和(自身を除く): 27013520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3089, 3460, 6178, 6920, 12356, 15445, 24712, 30890, 61780, 123560, 534397, 1068794, 2137588, 2671985, 4275176, 5343970, 10687940, 21375880]

約数ペア:

[(1, 21375880), (2, 10687940), (4, 5343970), (5, 4275176), (8, 2671985), (10, 2137588), (20, 1068794), (40, 534397), (173, 123560), (346, 61780), (692, 30890), (865, 24712), (1384, 15445), (1730, 12356), (3089, 6920), (3460, 6178)]