445000

素因数分解:

$2^3\times 5^4\times {\mathrm{89}}^1$

素因数の和:115

約数の個数: 40

約数和(自身を含む): 1054350

約数和(自身を除く): 609350

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 89, 100, 125, 178, 200, 250, 356, 445, 500, 625, 712, 890, 1000, 1250, 1780, 2225, 2500, 3560, 4450, 5000, 8900, 11125, 17800, 22250, 44500, 55625, 89000, 111250, 222500, 445000]

約数ペア:

[(1, 445000), (2, 222500), (4, 111250), (5, 89000), (8, 55625), (10, 44500), (20, 22250), (25, 17800), (40, 11125), (50, 8900), (89, 5000), (100, 4450), (125, 3560), (178, 2500), (200, 2225), (250, 1780), (356, 1250), (445, 1000), (500, 890), (625, 712)]