51286820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197257}}^1$

素因数の和:197279

約数の個数: 24

約数和(自身を含む): 115987704

約数和(自身を除く): 64700884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 197257, 394514, 789028, 986285, 1972570, 2564341, 3945140, 5128682, 10257364, 12821705, 25643410, 51286820]

約数ペア:

[(1, 51286820), (2, 25643410), (4, 12821705), (5, 10257364), (10, 5128682), (13, 3945140), (20, 2564341), (26, 1972570), (52, 986285), (65, 789028), (130, 394514), (260, 197257)]