21906183

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:136

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 14865657

約数列:

[1, 3, 13, 17, 19, 37, 39, 47, 51, 57, 111, 141, 221, 247, 323, 481, 611, 629, 663, 703, 741, 799, 893, 969, 1443, 1739, 1833, 1887, 2109, 2397, 2679, 4199, 5217, 8177, 9139, 10387, 11609, 11951, 12597, 15181, 22607, 24531, 27417, 29563, 31161, 33041, 34827, 35853, 45543, 67821, 88689, 99123, 155363, 197353, 384319, 429533, 466089, 561697, 592059, 1152957, 1288599, 1685091, 7302061, 21906183]

約数ペア:

[(1, 21906183), (3, 7302061), (13, 1685091), (17, 1288599), (19, 1152957), (37, 592059), (39, 561697), (47, 466089), (51, 429533), (57, 384319), (111, 197353), (141, 155363), (221, 99123), (247, 88689), (323, 67821), (481, 45543), (611, 35853), (629, 34827), (663, 33041), (703, 31161), (741, 29563), (799, 27417), (893, 24531), (969, 22607), (1443, 15181), (1739, 12597), (1833, 11951), (1887, 11609), (2109, 10387), (2397, 9139), (2679, 8177), (4199, 5217)]