20691327

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1\times {\mathrm{571}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 28334592

約数和(自身を除く): 7643265

約数列:

[1, 3, 47, 141, 257, 571, 771, 1713, 12079, 26837, 36237, 80511, 146747, 440241, 6897109, 20691327]

約数ペア:

[(1, 20691327), (3, 6897109), (47, 440241), (141, 146747), (257, 80511), (571, 36237), (771, 26837), (1713, 12079)]