127940500

素因数分解:

$2^2\times 5^3\times {\mathrm{41}}^1\times {\mathrm{79}}^2$

素因数の和:218

約数の個数: 72

約数和(自身を含む): 289906344

約数和(自身を除く): 161965844

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 79, 82, 100, 125, 158, 164, 205, 250, 316, 395, 410, 500, 790, 820, 1025, 1580, 1975, 2050, 3239, 3950, 4100, 5125, 6241, 6478, 7900, 9875, 10250, 12482, 12956, 16195, 19750, 20500, 24964, 31205, 32390, 39500, 62410, 64780, 80975, 124820, 156025, 161950, 255881, 312050, 323900, 404875, 511762, 624100, 780125, 809750, 1023524, 1279405, 1560250, 1619500, 2558810, 3120500, 5117620, 6397025, 12794050, 25588100, 31985125, 63970250, 127940500]

約数ペア:

[(1, 127940500), (2, 63970250), (4, 31985125), (5, 25588100), (10, 12794050), (20, 6397025), (25, 5117620), (41, 3120500), (50, 2558810), (79, 1619500), (82, 1560250), (100, 1279405), (125, 1023524), (158, 809750), (164, 780125), (205, 624100), (250, 511762), (316, 404875), (395, 323900), (410, 312050), (500, 255881), (790, 161950), (820, 156025), (1025, 124820), (1580, 80975), (1975, 64780), (2050, 62410), (3239, 39500), (3950, 32390), (4100, 31205), (5125, 24964), (6241, 20500), (6478, 19750), (7900, 16195), (9875, 12956), (10250, 12482)]