20521851

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9133}}^1$

素因数の和:9250

約数の個数: 16

約数和(自身を含む): 31567104

約数和(自身を除く): 11045253

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9133, 27399, 63931, 191793, 977231, 2931693, 6840617, 20521851]

約数ペア:

[(1, 20521851), (3, 6840617), (7, 2931693), (21, 977231), (107, 191793), (321, 63931), (749, 27399), (2247, 9133)]