19918928

素因数分解:

$2^4\times {\mathrm{311}}^1\times {\mathrm{4003}}^1$

素因数の和:4322

約数の個数: 20

約数和(自身を含む): 38726688

約数和(自身を除く): 18807760

約数列:

[1, 2, 4, 8, 16, 311, 622, 1244, 2488, 4003, 4976, 8006, 16012, 32024, 64048, 1244933, 2489866, 4979732, 9959464, 19918928]

約数ペア:

[(1, 19918928), (2, 9959464), (4, 4979732), (8, 2489866), (16, 1244933), (311, 64048), (622, 32024), (1244, 16012), (2488, 8006), (4003, 4976)]