20688381

素因数分解:

$3^2\times 7^1\times {\mathrm{541}}^1\times {\mathrm{607}}^1$

素因数の和:1161

約数の個数: 24

約数和(自身を含む): 34271744

約数和(自身を除く): 13583363

約数列:

[1, 3, 7, 9, 21, 63, 541, 607, 1623, 1821, 3787, 4249, 4869, 5463, 11361, 12747, 34083, 38241, 328387, 985161, 2298709, 2955483, 6896127, 20688381]

約数ペア:

[(1, 20688381), (3, 6896127), (7, 2955483), (9, 2298709), (21, 985161), (63, 328387), (541, 38241), (607, 34083), (1623, 12747), (1821, 11361), (3787, 5463), (4249, 4869)]