21125972

素因数分解:

$2^2\times 7^1\times {\mathrm{821}}^1\times {\mathrm{919}}^1$

素因数の和:1751

約数の個数: 24

約数和(自身を含む): 42349440

約数和(自身を除く): 21223468

約数列:

[1, 2, 4, 7, 14, 28, 821, 919, 1642, 1838, 3284, 3676, 5747, 6433, 11494, 12866, 22988, 25732, 754499, 1508998, 3017996, 5281493, 10562986, 21125972]

約数ペア:

[(1, 21125972), (2, 10562986), (4, 5281493), (7, 3017996), (14, 1508998), (28, 754499), (821, 25732), (919, 22988), (1642, 12866), (1838, 11494), (3284, 6433), (3676, 5747)]