19742000

素因数分解:

$2^4\times 5^3\times {\mathrm{9871}}^1$

素因数の和:9894

約数の個数: 40

約数和(自身を含む): 47740992

約数和(自身を除く): 27998992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 9871, 19742, 39484, 49355, 78968, 98710, 157936, 197420, 246775, 394840, 493550, 789680, 987100, 1233875, 1974200, 2467750, 3948400, 4935500, 9871000, 19742000]

約数ペア:

[(1, 19742000), (2, 9871000), (4, 4935500), (5, 3948400), (8, 2467750), (10, 1974200), (16, 1233875), (20, 987100), (25, 789680), (40, 493550), (50, 394840), (80, 246775), (100, 197420), (125, 157936), (200, 98710), (250, 78968), (400, 49355), (500, 39484), (1000, 19742), (2000, 9871)]