21238407

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 12906873

約数列:

[1, 3, 9, 23, 37, 47, 59, 69, 111, 141, 177, 207, 333, 423, 531, 851, 1081, 1357, 1739, 2183, 2553, 2773, 3243, 4071, 5217, 6549, 7659, 8319, 9729, 12213, 15651, 19647, 24957, 39997, 50209, 63779, 102601, 119991, 150627, 191337, 307803, 359973, 451881, 574011, 923409, 2359823, 7079469, 21238407]

約数ペア:

[(1, 21238407), (3, 7079469), (9, 2359823), (23, 923409), (37, 574011), (47, 451881), (59, 359973), (69, 307803), (111, 191337), (141, 150627), (177, 119991), (207, 102601), (333, 63779), (423, 50209), (531, 39997), (851, 24957), (1081, 19647), (1357, 15651), (1739, 12213), (2183, 9729), (2553, 8319), (2773, 7659), (3243, 6549), (4071, 5217)]