19845680

素因数分解:

$2^4\times 5^1\times {\mathrm{248071}}^1$

素因数の和:248084

約数の個数: 20

約数和(自身を含む): 46141392

約数和(自身を除く): 26295712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248071, 496142, 992284, 1240355, 1984568, 2480710, 3969136, 4961420, 9922840, 19845680]

約数ペア:

[(1, 19845680), (2, 9922840), (4, 4961420), (5, 3969136), (8, 2480710), (10, 1984568), (16, 1240355), (20, 992284), (40, 496142), (80, 248071)]