21003.000000

素因数分解:

$2^3\times 3^1\times {\mathrm{19801}}^1$

素因数の和:19810

約数の個数: 16

約数和(自身を含む): 1188120

約数和(自身を除く): 712896

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 19801, 39602, 59403, 79204, 118806, 158408, 237612, 475224]

約数ペア:

[(1, 475224), (2, 237612), (3, 158408), (4, 118806), (6, 79204), (8, 59403), (12, 39602), (24, 19801)]