20691944

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:730

約数の個数: 64

約数和(自身を含む): 48935040

約数和(自身を除く): 28243096

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 43, 52, 56, 86, 91, 104, 172, 182, 301, 344, 364, 559, 602, 661, 728, 1118, 1204, 1322, 2236, 2408, 2644, 3913, 4472, 4627, 5288, 7826, 8593, 9254, 15652, 17186, 18508, 28423, 31304, 34372, 37016, 56846, 60151, 68744, 113692, 120302, 198961, 227384, 240604, 369499, 397922, 481208, 738998, 795844, 1477996, 1591688, 2586493, 2955992, 5172986, 10345972, 20691944]

約数ペア:

[(1, 20691944), (2, 10345972), (4, 5172986), (7, 2955992), (8, 2586493), (13, 1591688), (14, 1477996), (26, 795844), (28, 738998), (43, 481208), (52, 397922), (56, 369499), (86, 240604), (91, 227384), (104, 198961), (172, 120302), (182, 113692), (301, 68744), (344, 60151), (364, 56846), (559, 37016), (602, 34372), (661, 31304), (728, 28423), (1118, 18508), (1204, 17186), (1322, 15652), (2236, 9254), (2408, 8593), (2644, 7826), (3913, 5288), (4472, 4627)]