20705175

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4001}}^1$

素因数の和:4040

約数の個数: 36

約数和(自身を含む): 38707344

約数和(自身を除く): 18002169

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4001, 5175, 12003, 20005, 36009, 60015, 92023, 100025, 180045, 276069, 300075, 460115, 828207, 900225, 1380345, 2300575, 4141035, 6901725, 20705175]

約数ペア:

[(1, 20705175), (3, 6901725), (5, 4141035), (9, 2300575), (15, 1380345), (23, 900225), (25, 828207), (45, 460115), (69, 300075), (75, 276069), (115, 180045), (207, 100025), (225, 92023), (345, 60015), (575, 36009), (1035, 20005), (1725, 12003), (4001, 5175)]