21333767

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{313}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 27061776

約数和(自身を除く): 5728009

約数列:

[1, 7, 13, 49, 91, 107, 313, 637, 749, 1391, 2191, 4069, 5243, 9737, 15337, 28483, 33491, 68159, 199381, 234437, 435383, 1641059, 3047681, 21333767]

約数ペア:

[(1, 21333767), (7, 3047681), (13, 1641059), (49, 435383), (91, 234437), (107, 199381), (313, 68159), (637, 33491), (749, 28483), (1391, 15337), (2191, 9737), (4069, 5243)]