21491056

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31237}}^1$

素因数の和:31288

約数の個数: 20

約数和(自身を含む): 42608632

約数和(自身を除く): 21117576

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31237, 62474, 124948, 249896, 499792, 1343191, 2686382, 5372764, 10745528, 21491056]

約数ペア:

[(1, 21491056), (2, 10745528), (4, 5372764), (8, 2686382), (16, 1343191), (43, 499792), (86, 249896), (172, 124948), (344, 62474), (688, 31237)]