20041000

素因数分解:

$2^3\times 5^3\times 7^2\times {\mathrm{409}}^1$

素因数の和:444

約数の個数: 96

約数和(自身を含む): 54685800

約数和(自身を除く): 34644800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 125, 140, 175, 196, 200, 245, 250, 280, 350, 392, 409, 490, 500, 700, 818, 875, 980, 1000, 1225, 1400, 1636, 1750, 1960, 2045, 2450, 2863, 3272, 3500, 4090, 4900, 5726, 6125, 7000, 8180, 9800, 10225, 11452, 12250, 14315, 16360, 20041, 20450, 22904, 24500, 28630, 40082, 40900, 49000, 51125, 57260, 71575, 80164, 81800, 100205, 102250, 114520, 143150, 160328, 200410, 204500, 286300, 357875, 400820, 409000, 501025, 572600, 715750, 801640, 1002050, 1431500, 2004100, 2505125, 2863000, 4008200, 5010250, 10020500, 20041000]

約数ペア:

[(1, 20041000), (2, 10020500), (4, 5010250), (5, 4008200), (7, 2863000), (8, 2505125), (10, 2004100), (14, 1431500), (20, 1002050), (25, 801640), (28, 715750), (35, 572600), (40, 501025), (49, 409000), (50, 400820), (56, 357875), (70, 286300), (98, 204500), (100, 200410), (125, 160328), (140, 143150), (175, 114520), (196, 102250), (200, 100205), (245, 81800), (250, 80164), (280, 71575), (350, 57260), (392, 51125), (409, 49000), (490, 40900), (500, 40082), (700, 28630), (818, 24500), (875, 22904), (980, 20450), (1000, 20041), (1225, 16360), (1400, 14315), (1636, 12250), (1750, 11452), (1960, 10225), (2045, 9800), (2450, 8180), (2863, 7000), (3272, 6125), (3500, 5726), (4090, 4900)]