81205000

素因数分解:

$2^3\times 5^4\times {\mathrm{109}}^1\times {\mathrm{149}}^1$

素因数の和:284

約数の個数: 80

約数和(自身を含む): 193297500

約数和(自身を除く): 112092500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 125, 149, 200, 218, 250, 298, 436, 500, 545, 596, 625, 745, 872, 1000, 1090, 1192, 1250, 1490, 2180, 2500, 2725, 2980, 3725, 4360, 5000, 5450, 5960, 7450, 10900, 13625, 14900, 16241, 18625, 21800, 27250, 29800, 32482, 37250, 54500, 64964, 68125, 74500, 81205, 93125, 109000, 129928, 136250, 149000, 162410, 186250, 272500, 324820, 372500, 406025, 545000, 649640, 745000, 812050, 1624100, 2030125, 3248200, 4060250, 8120500, 10150625, 16241000, 20301250, 40602500, 81205000]

約数ペア:

[(1, 81205000), (2, 40602500), (4, 20301250), (5, 16241000), (8, 10150625), (10, 8120500), (20, 4060250), (25, 3248200), (40, 2030125), (50, 1624100), (100, 812050), (109, 745000), (125, 649640), (149, 545000), (200, 406025), (218, 372500), (250, 324820), (298, 272500), (436, 186250), (500, 162410), (545, 149000), (596, 136250), (625, 129928), (745, 109000), (872, 93125), (1000, 81205), (1090, 74500), (1192, 68125), (1250, 64964), (1490, 54500), (2180, 37250), (2500, 32482), (2725, 29800), (2980, 27250), (3725, 21800), (4360, 18625), (5000, 16241), (5450, 14900), (5960, 13625), (7450, 10900)]