2180500

素因数分解:

$2^2\times 5^3\times 7^2\times {\mathrm{89}}^1$

素因数の和:122

約数の個数: 72

約数和(自身を含む): 5601960

約数和(自身を除く): 3421460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 89, 98, 100, 125, 140, 175, 178, 196, 245, 250, 350, 356, 445, 490, 500, 623, 700, 875, 890, 980, 1225, 1246, 1750, 1780, 2225, 2450, 2492, 3115, 3500, 4361, 4450, 4900, 6125, 6230, 8722, 8900, 11125, 12250, 12460, 15575, 17444, 21805, 22250, 24500, 31150, 43610, 44500, 62300, 77875, 87220, 109025, 155750, 218050, 311500, 436100, 545125, 1090250, 2180500]

約数ペア:

[(1, 2180500), (2, 1090250), (4, 545125), (5, 436100), (7, 311500), (10, 218050), (14, 155750), (20, 109025), (25, 87220), (28, 77875), (35, 62300), (49, 44500), (50, 43610), (70, 31150), (89, 24500), (98, 22250), (100, 21805), (125, 17444), (140, 15575), (175, 12460), (178, 12250), (196, 11125), (245, 8900), (250, 8722), (350, 6230), (356, 6125), (445, 4900), (490, 4450), (500, 4361), (623, 3500), (700, 3115), (875, 2492), (890, 2450), (980, 2225), (1225, 1780), (1246, 1750)]