20164000

素因数分解:

$2^5\times 5^3\times {\mathrm{71}}^2$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 50250564

約数和(自身を除く): 30086564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 71, 80, 100, 125, 142, 160, 200, 250, 284, 355, 400, 500, 568, 710, 800, 1000, 1136, 1420, 1775, 2000, 2272, 2840, 3550, 4000, 5041, 5680, 7100, 8875, 10082, 11360, 14200, 17750, 20164, 25205, 28400, 35500, 40328, 50410, 56800, 71000, 80656, 100820, 126025, 142000, 161312, 201640, 252050, 284000, 403280, 504100, 630125, 806560, 1008200, 1260250, 2016400, 2520500, 4032800, 5041000, 10082000, 20164000]

約数ペア:

[(1, 20164000), (2, 10082000), (4, 5041000), (5, 4032800), (8, 2520500), (10, 2016400), (16, 1260250), (20, 1008200), (25, 806560), (32, 630125), (40, 504100), (50, 403280), (71, 284000), (80, 252050), (100, 201640), (125, 161312), (142, 142000), (160, 126025), (200, 100820), (250, 80656), (284, 71000), (355, 56800), (400, 50410), (500, 40328), (568, 35500), (710, 28400), (800, 25205), (1000, 20164), (1136, 17750), (1420, 14200), (1775, 11360), (2000, 10082), (2272, 8875), (2840, 7100), (3550, 5680), (4000, 5041)]