19509664

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:389

約数の個数: 48

約数和(自身を含む): 40352256

約数和(自身を除く): 20842592

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 71, 124, 142, 248, 277, 284, 496, 554, 568, 992, 1108, 1136, 2201, 2216, 2272, 4402, 4432, 8587, 8804, 8864, 17174, 17608, 19667, 34348, 35216, 39334, 68696, 70432, 78668, 137392, 157336, 274784, 314672, 609677, 629344, 1219354, 2438708, 4877416, 9754832, 19509664]

約数ペア:

[(1, 19509664), (2, 9754832), (4, 4877416), (8, 2438708), (16, 1219354), (31, 629344), (32, 609677), (62, 314672), (71, 274784), (124, 157336), (142, 137392), (248, 78668), (277, 70432), (284, 68696), (496, 39334), (554, 35216), (568, 34348), (992, 19667), (1108, 17608), (1136, 17174), (2201, 8864), (2216, 8804), (2272, 8587), (4402, 4432)]