21573945

素因数分解:

$3^4\times 5^1\times {\mathrm{53269}}^1$

素因数の和:53286

約数の個数: 20

約数和(自身を含む): 38674020

約数和(自身を除く): 17100075

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53269, 159807, 266345, 479421, 799035, 1438263, 2397105, 4314789, 7191315, 21573945]

約数ペア:

[(1, 21573945), (3, 7191315), (5, 4314789), (9, 2397105), (15, 1438263), (27, 799035), (45, 479421), (81, 266345), (135, 159807), (405, 53269)]