81356470

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{625819}}^1$

素因数の和:625839

約数の個数: 16

約数和(自身を含む): 157706640

約数和(自身を除く): 76350170

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 625819, 1251638, 3129095, 6258190, 8135647, 16271294, 40678235, 81356470]

約数ペア:

[(1, 81356470), (2, 40678235), (5, 16271294), (10, 8135647), (13, 6258190), (26, 3129095), (65, 1251638), (130, 625819)]