21507297

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2837}}^1$

素因数の和:2885

約数の個数: 24

約数和(自身を含む): 34600896

約数和(自身を除く): 13093599

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2837, 7581, 8511, 19859, 53903, 59577, 161709, 377321, 1024157, 1131963, 3072471, 7169099, 21507297]

約数ペア:

[(1, 21507297), (3, 7169099), (7, 3072471), (19, 1131963), (21, 1024157), (57, 377321), (133, 161709), (361, 59577), (399, 53903), (1083, 19859), (2527, 8511), (2837, 7581)]