20291681680

素因数分解:

$2^4\times 5^1\times {\mathrm{253646021}}^1$

素因数の和:253646034

約数の個数: 20

約数和(自身を含む): 47178160092

約数和(自身を除く): 26886478412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253646021, 507292042, 1014584084, 1268230105, 2029168168, 2536460210, 4058336336, 5072920420, 10145840840, 20291681680]

約数ペア:

[(1, 20291681680), (2, 10145840840), (4, 5072920420), (5, 4058336336), (8, 2536460210), (10, 2029168168), (16, 1268230105), (20, 1014584084), (40, 507292042), (80, 253646021)]