21120345

素因数分解:

$3^5\times 5^1\times {\mathrm{17383}}^1$

素因数の和:17403

約数の個数: 24

約数和(自身を含む): 37966656

約数和(自身を除く): 16846311

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17383, 52149, 86915, 156447, 260745, 469341, 782235, 1408023, 2346705, 4224069, 7040115, 21120345]

約数ペア:

[(1, 21120345), (3, 7040115), (5, 4224069), (9, 2346705), (15, 1408023), (27, 782235), (45, 469341), (81, 260745), (135, 156447), (243, 86915), (405, 52149), (1215, 17383)]