7921000

素因数分解:

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

素因数の和:199

約数の個数: 48

約数和(自身を含む): 18745740

約数和(自身を除く): 10824740

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 89, 100, 125, 178, 200, 250, 356, 445, 500, 712, 890, 1000, 1780, 2225, 3560, 4450, 7921, 8900, 11125, 15842, 17800, 22250, 31684, 39605, 44500, 63368, 79210, 89000, 158420, 198025, 316840, 396050, 792100, 990125, 1584200, 1980250, 3960500, 7921000]

約数ペア:

[(1, 7921000), (2, 3960500), (4, 1980250), (5, 1584200), (8, 990125), (10, 792100), (20, 396050), (25, 316840), (40, 198025), (50, 158420), (89, 89000), (100, 79210), (125, 63368), (178, 44500), (200, 39605), (250, 31684), (356, 22250), (445, 17800), (500, 15842), (712, 11125), (890, 8900), (1000, 7921), (1780, 4450), (2225, 3560)]