20964866

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^2$

素因数の和:139

約数の個数: 48

約数和(自身を含む): 37820160

約数和(自身を除く): 16855294

約数列:

[1, 2, 13, 19, 26, 31, 37, 38, 62, 74, 247, 403, 481, 494, 589, 703, 806, 962, 1147, 1178, 1369, 1406, 2294, 2738, 7657, 9139, 14911, 15314, 17797, 18278, 21793, 26011, 29822, 35594, 42439, 43586, 52022, 84878, 283309, 338143, 551707, 566618, 676286, 806341, 1103414, 1612682, 10482433, 20964866]

約数ペア:

[(1, 20964866), (2, 10482433), (13, 1612682), (19, 1103414), (26, 806341), (31, 676286), (37, 566618), (38, 551707), (62, 338143), (74, 283309), (247, 84878), (403, 52022), (481, 43586), (494, 42439), (589, 35594), (703, 29822), (806, 26011), (962, 21793), (1147, 18278), (1178, 17797), (1369, 15314), (1406, 14911), (2294, 9139), (2738, 7657)]