21003493

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1999}}^1$

素因数の和:2104

約数の個数: 16

約数和(自身を含む): 25600000

約数和(自身を除く): 4596507

約数列:

[1, 7, 19, 79, 133, 553, 1501, 1999, 10507, 13993, 37981, 157921, 265867, 1105447, 3000499, 21003493]

約数ペア:

[(1, 21003493), (7, 3000499), (19, 1105447), (79, 265867), (133, 157921), (553, 37981), (1501, 13993), (1999, 10507)]