21348945

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20627}}^1$

素因数の和:20661

約数の個数: 24

約数和(自身を含む): 38615616

約数和(自身を除く): 17266671

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20627, 61881, 103135, 185643, 309405, 474421, 928215, 1423263, 2372105, 4269789, 7116315, 21348945]

約数ペア:

[(1, 21348945), (3, 7116315), (5, 4269789), (9, 2372105), (15, 1423263), (23, 928215), (45, 474421), (69, 309405), (115, 185643), (207, 103135), (345, 61881), (1035, 20627)]