20806864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{599}}^1$

素因数の和:787

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22940336

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 167, 208, 334, 599, 668, 1198, 1336, 2171, 2396, 2672, 4342, 4792, 7787, 8684, 9584, 15574, 17368, 31148, 34736, 62296, 100033, 124592, 200066, 400132, 800264, 1300429, 1600528, 2600858, 5201716, 10403432, 20806864]

約数ペア:

[(1, 20806864), (2, 10403432), (4, 5201716), (8, 2600858), (13, 1600528), (16, 1300429), (26, 800264), (52, 400132), (104, 200066), (167, 124592), (208, 100033), (334, 62296), (599, 34736), (668, 31148), (1198, 17368), (1336, 15574), (2171, 9584), (2396, 8684), (2672, 7787), (4342, 4792)]