21311787

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1723}}^1$

素因数の和:1783

約数の個数: 32

約数和(自身を含む): 35307520

約数和(自身を除く): 13995733

約数列:

[1, 3, 7, 19, 21, 31, 57, 93, 133, 217, 399, 589, 651, 1723, 1767, 4123, 5169, 12061, 12369, 32737, 36183, 53413, 98211, 160239, 229159, 373891, 687477, 1014847, 1121673, 3044541, 7103929, 21311787]

約数ペア:

[(1, 21311787), (3, 7103929), (7, 3044541), (19, 1121673), (21, 1014847), (31, 687477), (57, 373891), (93, 229159), (133, 160239), (217, 98211), (399, 53413), (589, 36183), (651, 32737), (1723, 12369), (1767, 12061), (4123, 5169)]