18640880

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{599}}^1$

素因数の和:1001

約数の個数: 40

約数和(自身を含む): 43524000

約数和(自身を除く): 24883120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 599, 778, 1198, 1556, 1945, 2396, 2995, 3112, 3890, 4792, 5990, 6224, 7780, 9584, 11980, 15560, 23960, 31120, 47920, 233011, 466022, 932044, 1165055, 1864088, 2330110, 3728176, 4660220, 9320440, 18640880]

約数ペア:

[(1, 18640880), (2, 9320440), (4, 4660220), (5, 3728176), (8, 2330110), (10, 1864088), (16, 1165055), (20, 932044), (40, 466022), (80, 233011), (389, 47920), (599, 31120), (778, 23960), (1198, 15560), (1556, 11980), (1945, 9584), (2396, 7780), (2995, 6224), (3112, 5990), (3890, 4792)]