8989000

素因数分解:

$2^3\times 5^3\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:211

約数の個数: 64

約数和(自身を含む): 21481200

約数和(自身を除く): 12492200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 89, 100, 101, 125, 178, 200, 202, 250, 356, 404, 445, 500, 505, 712, 808, 890, 1000, 1010, 1780, 2020, 2225, 2525, 3560, 4040, 4450, 5050, 8900, 8989, 10100, 11125, 12625, 17800, 17978, 20200, 22250, 25250, 35956, 44500, 44945, 50500, 71912, 89000, 89890, 101000, 179780, 224725, 359560, 449450, 898900, 1123625, 1797800, 2247250, 4494500, 8989000]

約数ペア:

[(1, 8989000), (2, 4494500), (4, 2247250), (5, 1797800), (8, 1123625), (10, 898900), (20, 449450), (25, 359560), (40, 224725), (50, 179780), (89, 101000), (100, 89890), (101, 89000), (125, 71912), (178, 50500), (200, 44945), (202, 44500), (250, 35956), (356, 25250), (404, 22250), (445, 20200), (500, 17978), (505, 17800), (712, 12625), (808, 11125), (890, 10100), (1000, 8989), (1010, 8900), (1780, 5050), (2020, 4450), (2225, 4040), (2525, 3560)]