19997943

素因数分解:

$3^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1481}}^1$

素因数の和:2134

約数の個数: 16

約数和(自身を含む): 30541056

約数和(自身を除く): 10543113

約数列:

[1, 3, 7, 21, 643, 1481, 1929, 4443, 4501, 10367, 13503, 31101, 952283, 2856849, 6665981, 19997943]

約数ペア:

[(1, 19997943), (3, 6665981), (7, 2856849), (21, 952283), (643, 31101), (1481, 13503), (1929, 10367), (4443, 4501)]