21152240

素因数分解:

$2^4\times 5^1\times {\mathrm{264403}}^1$

素因数の和:264416

約数の個数: 20

約数和(自身を含む): 49179144

約数和(自身を除く): 28026904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264403, 528806, 1057612, 1322015, 2115224, 2644030, 4230448, 5288060, 10576120, 21152240]

約数ペア:

[(1, 21152240), (2, 10576120), (4, 5288060), (5, 4230448), (8, 2644030), (10, 2115224), (16, 1322015), (20, 1057612), (40, 528806), (80, 264403)]