20688464

素因数分解:

$2^4\times {\mathrm{397}}^1\times {\mathrm{3257}}^1$

素因数の和:3662

約数の個数: 20

約数和(自身を含む): 40197204

約数和(自身を除く): 19508740

約数列:

[1, 2, 4, 8, 16, 397, 794, 1588, 3176, 3257, 6352, 6514, 13028, 26056, 52112, 1293029, 2586058, 5172116, 10344232, 20688464]

約数ペア:

[(1, 20688464), (2, 10344232), (4, 5172116), (8, 2586058), (16, 1293029), (397, 52112), (794, 26056), (1588, 13028), (3176, 6514), (3257, 6352)]