21287115

素因数分解:

$3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4421}}^1$

素因数の和:4539

約数の個数: 24

約数和(自身を含む): 37250928

約数和(自身を除く): 15963813

約数列:

[1, 3, 5, 9, 15, 45, 107, 321, 535, 963, 1605, 4421, 4815, 13263, 22105, 39789, 66315, 198945, 473047, 1419141, 2365235, 4257423, 7095705, 21287115]

約数ペア:

[(1, 21287115), (3, 7095705), (5, 4257423), (9, 2365235), (15, 1419141), (45, 473047), (107, 198945), (321, 66315), (535, 39789), (963, 22105), (1605, 13263), (4421, 4815)]