18983920

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{661}}^1$

素因数の和:1033

約数の個数: 40

約数和(自身を含む): 44327520

約数和(自身を除く): 25343600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 661, 718, 1322, 1436, 1795, 2644, 2872, 3305, 3590, 5288, 5744, 6610, 7180, 10576, 13220, 14360, 26440, 28720, 52880, 237299, 474598, 949196, 1186495, 1898392, 2372990, 3796784, 4745980, 9491960, 18983920]

約数ペア:

[(1, 18983920), (2, 9491960), (4, 4745980), (5, 3796784), (8, 2372990), (10, 1898392), (16, 1186495), (20, 949196), (40, 474598), (80, 237299), (359, 52880), (661, 28720), (718, 26440), (1322, 14360), (1436, 13220), (1795, 10576), (2644, 7180), (2872, 6610), (3305, 5744), (3590, 5288)]