21289918

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{607}}^1$

素因数の和:712

約数の個数: 32

約数和(自身を含む): 36771840

約数和(自身を除く): 15481922

約数列:

[1, 2, 13, 19, 26, 38, 71, 142, 247, 494, 607, 923, 1214, 1349, 1846, 2698, 7891, 11533, 15782, 17537, 23066, 35074, 43097, 86194, 149929, 299858, 560261, 818843, 1120522, 1637686, 10644959, 21289918]

約数ペア:

[(1, 21289918), (2, 10644959), (13, 1637686), (19, 1120522), (26, 818843), (38, 560261), (71, 299858), (142, 149929), (247, 86194), (494, 43097), (607, 35074), (923, 23066), (1214, 17537), (1349, 15782), (1846, 11533), (2698, 7891)]