7920040

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{509}}^1$

素因数の和:909

約数の個数: 32

約数和(自身を含む): 17901000

約数和(自身を除く): 9980960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 509, 778, 1018, 1556, 1945, 2036, 2545, 3112, 3890, 4072, 5090, 7780, 10180, 15560, 20360, 198001, 396002, 792004, 990005, 1584008, 1980010, 3960020, 7920040]

約数ペア:

[(1, 7920040), (2, 3960020), (4, 1980010), (5, 1584008), (8, 990005), (10, 792004), (20, 396002), (40, 198001), (389, 20360), (509, 15560), (778, 10180), (1018, 7780), (1556, 5090), (1945, 4072), (2036, 3890), (2545, 3112)]