18781607420

素因数分解:

$2^2\times 5^1\times {\mathrm{939080371}}^1$

素因数の和:939080380

約数の個数: 12

約数和(自身を含む): 39441375624

約数和(自身を除く): 20659768204

約数列:

[1, 2, 4, 5, 10, 20, 939080371, 1878160742, 3756321484, 4695401855, 9390803710, 18781607420]

約数ペア:

[(1, 18781607420), (2, 9390803710), (4, 4695401855), (5, 3756321484), (10, 1878160742), (20, 939080371)]