21004004

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{25867}}^1$

素因数の和:25907

約数の個数: 24

約数和(自身を含む): 43458240

約数和(自身を除く): 22454236

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812, 25867, 51734, 103468, 181069, 362138, 724276, 750143, 1500286, 3000572, 5251001, 10502002, 21004004]

約数ペア:

[(1, 21004004), (2, 10502002), (4, 5251001), (7, 3000572), (14, 1500286), (28, 750143), (29, 724276), (58, 362138), (116, 181069), (203, 103468), (406, 51734), (812, 25867)]