21042520

素因数分解:

$2^3\times 5^1\times {\mathrm{526063}}^1$

素因数の和:526074

約数の個数: 16

約数和(自身を含む): 47345760

約数和(自身を除く): 26303240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 526063, 1052126, 2104252, 2630315, 4208504, 5260630, 10521260, 21042520]

約数ペア:

[(1, 21042520), (2, 10521260), (4, 5260630), (5, 4208504), (8, 2630315), (10, 2104252), (20, 1052126), (40, 526063)]