20708247

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{20981}}^1$

素因数の和:21038

約数の個数: 16

約数和(自身を含む): 32228352

約数和(自身を除く): 11520105

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 20981, 62943, 146867, 440601, 986107, 2958321, 6902749, 20708247]

約数ペア:

[(1, 20708247), (3, 6902749), (7, 2958321), (21, 986107), (47, 440601), (141, 146867), (329, 62943), (987, 20981)]