21260840

素因数分解:

$2^3\times 5^1\times {\mathrm{531521}}^1$

素因数の和:531532

約数の個数: 16

約数和(自身を含む): 47836980

約数和(自身を除く): 26576140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531521, 1063042, 2126084, 2657605, 4252168, 5315210, 10630420, 21260840]

約数ペア:

[(1, 21260840), (2, 10630420), (4, 5315210), (5, 4252168), (8, 2657605), (10, 2126084), (20, 1063042), (40, 531521)]