18890000

素因数分解:

$2^4\times 5^4\times {\mathrm{1889}}^1$

素因数の和:1917

約数の個数: 50

約数和(自身を含む): 45758790

約数和(自身を除く): 26868790

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1889, 2000, 2500, 3778, 5000, 7556, 9445, 10000, 15112, 18890, 30224, 37780, 47225, 75560, 94450, 151120, 188900, 236125, 377800, 472250, 755600, 944500, 1180625, 1889000, 2361250, 3778000, 4722500, 9445000, 18890000]

約数ペア:

[(1, 18890000), (2, 9445000), (4, 4722500), (5, 3778000), (8, 2361250), (10, 1889000), (16, 1180625), (20, 944500), (25, 755600), (40, 472250), (50, 377800), (80, 236125), (100, 188900), (125, 151120), (200, 94450), (250, 75560), (400, 47225), (500, 37780), (625, 30224), (1000, 18890), (1250, 15112), (1889, 10000), (2000, 9445), (2500, 7556), (3778, 5000)]