20927721

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{571}}^1\times {\mathrm{643}}^1$

素因数の和:1236

約数の個数: 16

約数和(自身を含む): 29469440

約数和(自身を除く): 8541719

約数列:

[1, 3, 19, 57, 571, 643, 1713, 1929, 10849, 12217, 32547, 36651, 367153, 1101459, 6975907, 20927721]

約数ペア:

[(1, 20927721), (3, 6975907), (19, 1101459), (57, 367153), (571, 36651), (643, 32547), (1713, 12217), (1929, 10849)]