1691000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:129

約数の個数: 64

約数和(自身を含む): 4212000

約数和(自身を除く): 2521000

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 89, 95, 100, 125, 152, 178, 190, 200, 250, 356, 380, 445, 475, 500, 712, 760, 890, 950, 1000, 1691, 1780, 1900, 2225, 2375, 3382, 3560, 3800, 4450, 4750, 6764, 8455, 8900, 9500, 11125, 13528, 16910, 17800, 19000, 22250, 33820, 42275, 44500, 67640, 84550, 89000, 169100, 211375, 338200, 422750, 845500, 1691000]

約数ペア:

[(1, 1691000), (2, 845500), (4, 422750), (5, 338200), (8, 211375), (10, 169100), (19, 89000), (20, 84550), (25, 67640), (38, 44500), (40, 42275), (50, 33820), (76, 22250), (89, 19000), (95, 17800), (100, 16910), (125, 13528), (152, 11125), (178, 9500), (190, 8900), (200, 8455), (250, 6764), (356, 4750), (380, 4450), (445, 3800), (475, 3560), (500, 3382), (712, 2375), (760, 2225), (890, 1900), (950, 1780), (1000, 1691)]