21291225985

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{968003}}^1$

素因数の和:968144

約数の個数: 16

約数和(自身を含む): 26345196864

約数和(自身を除く): 5053970879

約数列:

[1, 5, 53, 83, 265, 415, 4399, 21995, 968003, 4840015, 51304159, 80344249, 256520795, 401721245, 4258245197, 21291225985]

約数ペア:

[(1, 21291225985), (5, 4258245197), (53, 401721245), (83, 256520795), (265, 80344249), (415, 51304159), (4399, 4840015), (21995, 968003)]