21294028

素因数分解:

$2^2\times 7^2\times {\mathrm{108643}}^1$

素因数の和:108661

約数の個数: 18

約数和(自身を含む): 43348956

約数和(自身を除く): 22054928

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 108643, 217286, 434572, 760501, 1521002, 3042004, 5323507, 10647014, 21294028]

約数ペア:

[(1, 21294028), (2, 10647014), (4, 5323507), (7, 3042004), (14, 1521002), (28, 760501), (49, 434572), (98, 217286), (196, 108643)]