21811678

素因数分解:

$2^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{2357}}^1$

素因数の和:3027

約数の個数: 16

約数和(自身を含む): 37463904

約数和(自身を除く): 15652226

約数列:

[1, 2, 7, 14, 661, 1322, 2357, 4627, 4714, 9254, 16499, 32998, 1557977, 3115954, 10905839, 21811678]

約数ペア:

[(1, 21811678), (2, 10905839), (7, 3115954), (14, 1557977), (661, 32998), (1322, 16499), (2357, 9254), (4627, 4714)]