21247005

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108959}}^1$

素因数の和:108980

約数の個数: 16

約数和(自身を含む): 36610560

約数和(自身を除く): 15363555

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 108959, 326877, 544795, 1416467, 1634385, 4249401, 7082335, 21247005]

約数ペア:

[(1, 21247005), (3, 7082335), (5, 4249401), (13, 1634385), (15, 1416467), (39, 544795), (65, 326877), (195, 108959)]