21489790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{433}}^1\times {\mathrm{709}}^1$

素因数の和:1156

約数の個数: 32

約数和(自身を含む): 44372160

約数和(自身を除く): 22882370

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 433, 709, 866, 1418, 2165, 3031, 3545, 4330, 4963, 6062, 7090, 9926, 15155, 24815, 30310, 49630, 306997, 613994, 1534985, 2148979, 3069970, 4297958, 10744895, 21489790]

約数ペア:

[(1, 21489790), (2, 10744895), (5, 4297958), (7, 3069970), (10, 2148979), (14, 1534985), (35, 613994), (70, 306997), (433, 49630), (709, 30310), (866, 24815), (1418, 15155), (2165, 9926), (3031, 7090), (3545, 6062), (4330, 4963)]