80971925

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{401}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 103633992

約数和(自身を除く): 22662067

約数列:

[1, 5, 25, 41, 197, 205, 401, 985, 1025, 2005, 4925, 8077, 10025, 16441, 40385, 78997, 82205, 201925, 394985, 411025, 1974925, 3238877, 16194385, 80971925]

約数ペア:

[(1, 80971925), (5, 16194385), (25, 3238877), (41, 1974925), (197, 411025), (205, 394985), (401, 201925), (985, 82205), (1025, 78997), (2005, 40385), (4925, 16441), (8077, 10025)]