21720376

素因数分解:

$2^3\times {\mathrm{821}}^1\times {\mathrm{3307}}^1$

素因数の和:4134

約数の個数: 16

約数和(自身を含む): 40787640

約数和(自身を除く): 19067264

約数列:

[1, 2, 4, 8, 821, 1642, 3284, 3307, 6568, 6614, 13228, 26456, 2715047, 5430094, 10860188, 21720376]

約数ペア:

[(1, 21720376), (2, 10860188), (4, 5430094), (8, 2715047), (821, 26456), (1642, 13228), (3284, 6614), (3307, 6568)]