18215547

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:743

約数の個数: 32

約数和(自身を含む): 29675520

約数和(自身を除く): 11459973

約数列:

[1, 3, 7, 19, 21, 57, 71, 133, 213, 399, 497, 643, 1349, 1491, 1929, 4047, 4501, 9443, 12217, 13503, 28329, 36651, 45653, 85519, 136959, 256557, 319571, 867407, 958713, 2602221, 6071849, 18215547]

約数ペア:

[(1, 18215547), (3, 6071849), (7, 2602221), (19, 958713), (21, 867407), (57, 319571), (71, 256557), (133, 136959), (213, 85519), (399, 45653), (497, 36651), (643, 28329), (1349, 13503), (1491, 12217), (1929, 9443), (4047, 4501)]