20788780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1051}}^1$

素因数の和:1126

約数の個数: 48

約数和(自身を含む): 46658304

約数和(自身を除く): 25869524

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1051, 1978, 2102, 3956, 4204, 4945, 5255, 9890, 10510, 19780, 21020, 24173, 45193, 48346, 90386, 96692, 120865, 180772, 225965, 241730, 451930, 483460, 903860, 1039439, 2078878, 4157756, 5197195, 10394390, 20788780]

約数ペア:

[(1, 20788780), (2, 10394390), (4, 5197195), (5, 4157756), (10, 2078878), (20, 1039439), (23, 903860), (43, 483460), (46, 451930), (86, 241730), (92, 225965), (115, 180772), (172, 120865), (215, 96692), (230, 90386), (430, 48346), (460, 45193), (860, 24173), (989, 21020), (1051, 19780), (1978, 10510), (2102, 9890), (3956, 5255), (4204, 4945)]