21239918

素因数分解:

$2^1\times 7^1\times {\mathrm{379}}^1\times {\mathrm{4003}}^1$

素因数の和:4391

約数の個数: 16

約数和(自身を含む): 36516480

約数和(自身を除く): 15276562

約数列:

[1, 2, 7, 14, 379, 758, 2653, 4003, 5306, 8006, 28021, 56042, 1517137, 3034274, 10619959, 21239918]

約数ペア:

[(1, 21239918), (2, 10619959), (7, 3034274), (14, 1517137), (379, 56042), (758, 28021), (2653, 8006), (4003, 5306)]