21978736

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{105667}}^1$

素因数の和:105688

約数の個数: 20

約数和(自身を含む): 45859912

約数和(自身を除く): 23881176

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 105667, 211334, 422668, 845336, 1373671, 1690672, 2747342, 5494684, 10989368, 21978736]

約数ペア:

[(1, 21978736), (2, 10989368), (4, 5494684), (8, 2747342), (13, 1690672), (16, 1373671), (26, 845336), (52, 422668), (104, 211334), (208, 105667)]