20409880

素因数分解:

$2^3\times 5^1\times {\mathrm{510247}}^1$

素因数の和:510258

約数の個数: 16

約数和(自身を含む): 45922320

約数和(自身を除く): 25512440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 510247, 1020494, 2040988, 2551235, 4081976, 5102470, 10204940, 20409880]

約数ペア:

[(1, 20409880), (2, 10204940), (4, 5102470), (5, 4081976), (8, 2551235), (10, 2040988), (20, 1020494), (40, 510247)]