9985000

素因数分解:

$2^3\times 5^4\times {\mathrm{1997}}^1$

素因数の和:2023

約数の個数: 40

約数和(自身を含む): 23406570

約数和(自身を除く): 13421570

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 1997, 2500, 3994, 5000, 7988, 9985, 15976, 19970, 39940, 49925, 79880, 99850, 199700, 249625, 399400, 499250, 998500, 1248125, 1997000, 2496250, 4992500, 9985000]

約数ペア:

[(1, 9985000), (2, 4992500), (4, 2496250), (5, 1997000), (8, 1248125), (10, 998500), (20, 499250), (25, 399400), (40, 249625), (50, 199700), (100, 99850), (125, 79880), (200, 49925), (250, 39940), (500, 19970), (625, 15976), (1000, 9985), (1250, 7988), (1997, 5000), (2500, 3994)]