21538384

素因数分解:

$2^4\times 7^1\times {\mathrm{192307}}^1$

素因数の和:192322

約数の個数: 20

約数和(自身を含む): 47692384

約数和(自身を除く): 26154000

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 192307, 384614, 769228, 1346149, 1538456, 2692298, 3076912, 5384596, 10769192, 21538384]

約数ペア:

[(1, 21538384), (2, 10769192), (4, 5384596), (7, 3076912), (8, 2692298), (14, 1538456), (16, 1346149), (28, 769228), (56, 384614), (112, 192307)]