3960020

素因数分解:

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

素因数の和:907

約数の個数: 24

約数和(自身を含む): 8353800

約数和(自身を除く): 4393780

約数列:

[1, 2, 4, 5, 10, 20, 389, 509, 778, 1018, 1556, 1945, 2036, 2545, 3890, 5090, 7780, 10180, 198001, 396002, 792004, 990005, 1980010, 3960020]

約数ペア:

[(1, 3960020), (2, 1980010), (4, 990005), (5, 792004), (10, 396002), (20, 198001), (389, 10180), (509, 7780), (778, 5090), (1018, 3890), (1556, 2545), (1945, 2036)]