78778520

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{19121}}^1$

素因数の和:19235

約数の個数: 32

約数和(自身を含む): 178981920

約数和(自身を除く): 100203400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 19121, 38242, 76484, 95605, 152968, 191210, 382420, 764840, 1969463, 3938926, 7877852, 9847315, 15755704, 19694630, 39389260, 78778520]

約数ペア:

[(1, 78778520), (2, 39389260), (4, 19694630), (5, 15755704), (8, 9847315), (10, 7877852), (20, 3938926), (40, 1969463), (103, 764840), (206, 382420), (412, 191210), (515, 152968), (824, 95605), (1030, 76484), (2060, 38242), (4120, 19121)]