21329960

素因数分解:

$2^3\times 5^1\times {\mathrm{533249}}^1$

素因数の和:533260

約数の個数: 16

約数和(自身を含む): 47992500

約数和(自身を除く): 26662540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 533249, 1066498, 2132996, 2666245, 4265992, 5332490, 10664980, 21329960]

約数ペア:

[(1, 21329960), (2, 10664980), (4, 5332490), (5, 4265992), (8, 2666245), (10, 2132996), (20, 1066498), (40, 533249)]