81811025

素因数分解:

$5^2\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{443}}^1$

素因数の和:625

約数の個数: 24

約数和(自身を含む): 104055840

約数和(自身を除く): 22244815

約数列:

[1, 5, 25, 83, 89, 415, 443, 445, 2075, 2215, 2225, 7387, 11075, 36769, 36935, 39427, 183845, 184675, 197135, 919225, 985675, 3272441, 16362205, 81811025]

約数ペア:

[(1, 81811025), (5, 16362205), (25, 3272441), (83, 985675), (89, 919225), (415, 197135), (443, 184675), (445, 183845), (2075, 39427), (2215, 36935), (2225, 36769), (7387, 11075)]