1290040

素因数分解:

$2^3\times 5^1\times {\mathrm{32251}}^1$

素因数の和:32262

約数の個数: 16

約数和(自身を含む): 2902680

約数和(自身を除く): 1612640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 32251, 64502, 129004, 161255, 258008, 322510, 645020, 1290040]

約数ペア:

[(1, 1290040), (2, 645020), (4, 322510), (5, 258008), (8, 161255), (10, 129004), (20, 64502), (40, 32251)]