20499992

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2591}}^1$

素因数の和:2663

約数の個数: 32

約数和(自身を含む): 41057280

約数和(自身を除く): 20557288

約数列:

[1, 2, 4, 8, 23, 43, 46, 86, 92, 172, 184, 344, 989, 1978, 2591, 3956, 5182, 7912, 10364, 20728, 59593, 111413, 119186, 222826, 238372, 445652, 476744, 891304, 2562499, 5124998, 10249996, 20499992]

約数ペア:

[(1, 20499992), (2, 10249996), (4, 5124998), (8, 2562499), (23, 891304), (43, 476744), (46, 445652), (86, 238372), (92, 222826), (172, 119186), (184, 111413), (344, 59593), (989, 20728), (1978, 10364), (2591, 7912), (3956, 5182)]