18994015

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{619}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 25511760

約数和(自身を除く): 6517745

約数列:

[1, 5, 17, 19, 85, 95, 323, 361, 619, 1615, 1805, 3095, 6137, 10523, 11761, 30685, 52615, 58805, 199937, 223459, 999685, 1117295, 3798803, 18994015]

約数ペア:

[(1, 18994015), (5, 3798803), (17, 1117295), (19, 999685), (85, 223459), (95, 199937), (323, 58805), (361, 52615), (619, 30685), (1615, 11761), (1805, 10523), (3095, 6137)]