81159940

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{55589}}^1$

素因数の和:55671

約数の個数: 24

約数和(自身を含む): 172773720

約数和(自身を除く): 91613780

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 55589, 111178, 222356, 277945, 555890, 1111780, 4057997, 8115994, 16231988, 20289985, 40579970, 81159940]

約数ペア:

[(1, 81159940), (2, 40579970), (4, 20289985), (5, 16231988), (10, 8115994), (20, 4057997), (73, 1111780), (146, 555890), (292, 277945), (365, 222356), (730, 111178), (1460, 55589)]