20090000

素因数分解:

$2^4\times 5^4\times 7^2\times {\mathrm{41}}^1$

素因数の和:83

約数の個数: 150

約数和(自身を含む): 57961134

約数和(自身を除く): 37871134

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 41, 49, 50, 56, 70, 80, 82, 98, 100, 112, 125, 140, 164, 175, 196, 200, 205, 245, 250, 280, 287, 328, 350, 392, 400, 410, 490, 500, 560, 574, 625, 656, 700, 784, 820, 875, 980, 1000, 1025, 1148, 1225, 1250, 1400, 1435, 1640, 1750, 1960, 2000, 2009, 2050, 2296, 2450, 2500, 2800, 2870, 3280, 3500, 3920, 4018, 4100, 4375, 4592, 4900, 5000, 5125, 5740, 6125, 7000, 7175, 8036, 8200, 8750, 9800, 10000, 10045, 10250, 11480, 12250, 14000, 14350, 16072, 16400, 17500, 19600, 20090, 20500, 22960, 24500, 25625, 28700, 30625, 32144, 35000, 35875, 40180, 41000, 49000, 50225, 51250, 57400, 61250, 70000, 71750, 80360, 82000, 98000, 100450, 102500, 114800, 122500, 143500, 160720, 179375, 200900, 205000, 245000, 251125, 287000, 358750, 401800, 410000, 490000, 502250, 574000, 717500, 803600, 1004500, 1255625, 1435000, 2009000, 2511250, 2870000, 4018000, 5022500, 10045000, 20090000]

約数ペア:

[(1, 20090000), (2, 10045000), (4, 5022500), (5, 4018000), (7, 2870000), (8, 2511250), (10, 2009000), (14, 1435000), (16, 1255625), (20, 1004500), (25, 803600), (28, 717500), (35, 574000), (40, 502250), (41, 490000), (49, 410000), (50, 401800), (56, 358750), (70, 287000), (80, 251125), (82, 245000), (98, 205000), (100, 200900), (112, 179375), (125, 160720), (140, 143500), (164, 122500), (175, 114800), (196, 102500), (200, 100450), (205, 98000), (245, 82000), (250, 80360), (280, 71750), (287, 70000), (328, 61250), (350, 57400), (392, 51250), (400, 50225), (410, 49000), (490, 41000), (500, 40180), (560, 35875), (574, 35000), (625, 32144), (656, 30625), (700, 28700), (784, 25625), (820, 24500), (875, 22960), (980, 20500), (1000, 20090), (1025, 19600), (1148, 17500), (1225, 16400), (1250, 16072), (1400, 14350), (1435, 14000), (1640, 12250), (1750, 11480), (1960, 10250), (2000, 10045), (2009, 10000), (2050, 9800), (2296, 8750), (2450, 8200), (2500, 8036), (2800, 7175), (2870, 7000), (3280, 6125), (3500, 5740), (3920, 5125), (4018, 5000), (4100, 4900), (4375, 4592)]