19997000

素因数分解:

$2^3\times 5^3\times {\mathrm{19997}}^1$

素因数の和:20018

約数の個数: 32

約数和(自身を含む): 46795320

約数和(自身を除く): 26798320

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 19997, 39994, 79988, 99985, 159976, 199970, 399940, 499925, 799880, 999850, 1999700, 2499625, 3999400, 4999250, 9998500, 19997000]

約数ペア:

[(1, 19997000), (2, 9998500), (4, 4999250), (5, 3999400), (8, 2499625), (10, 1999700), (20, 999850), (25, 799880), (40, 499925), (50, 399940), (100, 199970), (125, 159976), (200, 99985), (250, 79988), (500, 39994), (1000, 19997)]