20642000

素因数分解:

$2^4\times 5^3\times {\mathrm{10321}}^1$

素因数の和:10344

約数の個数: 40

約数和(自身を含む): 49917192

約数和(自身を除く): 29275192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10321, 20642, 41284, 51605, 82568, 103210, 165136, 206420, 258025, 412840, 516050, 825680, 1032100, 1290125, 2064200, 2580250, 4128400, 5160500, 10321000, 20642000]

約数ペア:

[(1, 20642000), (2, 10321000), (4, 5160500), (5, 4128400), (8, 2580250), (10, 2064200), (16, 1290125), (20, 1032100), (25, 825680), (40, 516050), (50, 412840), (80, 258025), (100, 206420), (125, 165136), (200, 103210), (250, 82568), (400, 51605), (500, 41284), (1000, 20642), (2000, 10321)]