21375425

素因数分解:

$5^2\times {\mathrm{79}}^2\times {\mathrm{137}}^1$

素因数の和:305

約数の個数: 18

約数和(自身を含む): 27041238

約数和(自身を除く): 5665813

約数列:

[1, 5, 25, 79, 137, 395, 685, 1975, 3425, 6241, 10823, 31205, 54115, 156025, 270575, 855017, 4275085, 21375425]

約数ペア:

[(1, 21375425), (5, 4275085), (25, 855017), (79, 270575), (137, 156025), (395, 54115), (685, 31205), (1975, 10823), (3425, 6241)]