21009880

素因数分解:

$2^3\times 5^1\times {\mathrm{525247}}^1$

素因数の和:525258

約数の個数: 16

約数和(自身を含む): 47272320

約数和(自身を除く): 26262440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525247, 1050494, 2100988, 2626235, 4201976, 5252470, 10504940, 21009880]

約数ペア:

[(1, 21009880), (2, 10504940), (4, 5252470), (5, 4201976), (8, 2626235), (10, 2100988), (20, 1050494), (40, 525247)]