21077968

素因数分解:

$2^4\times {\mathrm{661}}^1\times {\mathrm{1993}}^1$

素因数の和:2662

約数の個数: 20

約数和(自身を含む): 40920868

約数和(自身を除く): 19842900

約数列:

[1, 2, 4, 8, 16, 661, 1322, 1993, 2644, 3986, 5288, 7972, 10576, 15944, 31888, 1317373, 2634746, 5269492, 10538984, 21077968]

約数ペア:

[(1, 21077968), (2, 10538984), (4, 5269492), (8, 2634746), (16, 1317373), (661, 31888), (1322, 15944), (1993, 10576), (2644, 7972), (3986, 5288)]