81990400

素因数分解:

$2^8\times 5^2\times {\mathrm{23}}^1\times {\mathrm{557}}^1$

素因数の和:606

約数の個数: 108

約数和(自身を含む): 212142672

約数和(自身を除く): 130152272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 32, 40, 46, 50, 64, 80, 92, 100, 115, 128, 160, 184, 200, 230, 256, 320, 368, 400, 460, 557, 575, 640, 736, 800, 920, 1114, 1150, 1280, 1472, 1600, 1840, 2228, 2300, 2785, 2944, 3200, 3680, 4456, 4600, 5570, 5888, 6400, 7360, 8912, 9200, 11140, 12811, 13925, 14720, 17824, 18400, 22280, 25622, 27850, 29440, 35648, 36800, 44560, 51244, 55700, 64055, 71296, 73600, 89120, 102488, 111400, 128110, 142592, 147200, 178240, 204976, 222800, 256220, 320275, 356480, 409952, 445600, 512440, 640550, 712960, 819904, 891200, 1024880, 1281100, 1639808, 1782400, 2049760, 2562200, 3279616, 3564800, 4099520, 5124400, 8199040, 10248800, 16398080, 20497600, 40995200, 81990400]

約数ペア:

[(1, 81990400), (2, 40995200), (4, 20497600), (5, 16398080), (8, 10248800), (10, 8199040), (16, 5124400), (20, 4099520), (23, 3564800), (25, 3279616), (32, 2562200), (40, 2049760), (46, 1782400), (50, 1639808), (64, 1281100), (80, 1024880), (92, 891200), (100, 819904), (115, 712960), (128, 640550), (160, 512440), (184, 445600), (200, 409952), (230, 356480), (256, 320275), (320, 256220), (368, 222800), (400, 204976), (460, 178240), (557, 147200), (575, 142592), (640, 128110), (736, 111400), (800, 102488), (920, 89120), (1114, 73600), (1150, 71296), (1280, 64055), (1472, 55700), (1600, 51244), (1840, 44560), (2228, 36800), (2300, 35648), (2785, 29440), (2944, 27850), (3200, 25622), (3680, 22280), (4456, 18400), (4600, 17824), (5570, 14720), (5888, 13925), (6400, 12811), (7360, 11140), (8912, 9200)]