642661825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{27851}}^1$

素因数の和:27945

約数の個数: 24

約数和(自身を含む): 870319296

約数和(自身を除く): 227657471

約数列:

[1, 5, 13, 25, 65, 71, 325, 355, 923, 1775, 4615, 23075, 27851, 139255, 362063, 696275, 1810315, 1977421, 9051575, 9887105, 25706473, 49435525, 128532365, 642661825]

約数ペア:

[(1, 642661825), (5, 128532365), (13, 49435525), (25, 25706473), (65, 9887105), (71, 9051575), (325, 1977421), (355, 1810315), (923, 696275), (1775, 362063), (4615, 139255), (23075, 27851)]