20538778

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{18371}}^1$

素因数の和:18429

約数の個数: 16

約数和(自身を含む): 33951456

約数和(自身を除く): 13412678

約数列:

[1, 2, 13, 26, 43, 86, 559, 1118, 18371, 36742, 238823, 477646, 789953, 1579906, 10269389, 20538778]

約数ペア:

[(1, 20538778), (2, 10269389), (13, 1579906), (26, 789953), (43, 477646), (86, 238823), (559, 36742), (1118, 18371)]