20801968

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{653}}^1$

素因数の和:853

約数の個数: 40

約数和(自身を含む): 44278416

約数和(自身を除く): 23476448

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 181, 362, 653, 724, 1306, 1448, 1991, 2612, 2896, 3982, 5224, 7183, 7964, 10448, 14366, 15928, 28732, 31856, 57464, 114928, 118193, 236386, 472772, 945544, 1300123, 1891088, 2600246, 5200492, 10400984, 20801968]

約数ペア:

[(1, 20801968), (2, 10400984), (4, 5200492), (8, 2600246), (11, 1891088), (16, 1300123), (22, 945544), (44, 472772), (88, 236386), (176, 118193), (181, 114928), (362, 57464), (653, 31856), (724, 28732), (1306, 15928), (1448, 14366), (1991, 10448), (2612, 7964), (2896, 7183), (3982, 5224)]