78620140

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{7723}}^1$

素因数の和:8241

約数の個数: 24

約数和(自身を含む): 165448080

約数和(自身を除く): 86827940

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2545, 5090, 7723, 10180, 15446, 30892, 38615, 77230, 154460, 3931007, 7862014, 15724028, 19655035, 39310070, 78620140]

約数ペア:

[(1, 78620140), (2, 39310070), (4, 19655035), (5, 15724028), (10, 7862014), (20, 3931007), (509, 154460), (1018, 77230), (2036, 38615), (2545, 30892), (5090, 15446), (7723, 10180)]