20699800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{97}}^2$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 53049060

約数和(自身を除く): 32349260

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 97, 100, 110, 194, 200, 220, 275, 388, 440, 485, 550, 776, 970, 1067, 1100, 1940, 2134, 2200, 2425, 3880, 4268, 4850, 5335, 8536, 9409, 9700, 10670, 18818, 19400, 21340, 26675, 37636, 42680, 47045, 53350, 75272, 94090, 103499, 106700, 188180, 206998, 213400, 235225, 376360, 413996, 470450, 517495, 827992, 940900, 1034990, 1881800, 2069980, 2587475, 4139960, 5174950, 10349900, 20699800]

約数ペア:

[(1, 20699800), (2, 10349900), (4, 5174950), (5, 4139960), (8, 2587475), (10, 2069980), (11, 1881800), (20, 1034990), (22, 940900), (25, 827992), (40, 517495), (44, 470450), (50, 413996), (55, 376360), (88, 235225), (97, 213400), (100, 206998), (110, 188180), (194, 106700), (200, 103499), (220, 94090), (275, 75272), (388, 53350), (440, 47045), (485, 42680), (550, 37636), (776, 26675), (970, 21340), (1067, 19400), (1100, 18818), (1940, 10670), (2134, 9700), (2200, 9409), (2425, 8536), (3880, 5335), (4268, 4850)]