20969540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{397}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 46804800

約数和(自身を除く): 25835260

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 139, 190, 278, 380, 397, 556, 695, 794, 1390, 1588, 1985, 2641, 2780, 3970, 5282, 7543, 7940, 10564, 13205, 15086, 26410, 30172, 37715, 52820, 55183, 75430, 110366, 150860, 220732, 275915, 551830, 1048477, 1103660, 2096954, 4193908, 5242385, 10484770, 20969540]

約数ペア:

[(1, 20969540), (2, 10484770), (4, 5242385), (5, 4193908), (10, 2096954), (19, 1103660), (20, 1048477), (38, 551830), (76, 275915), (95, 220732), (139, 150860), (190, 110366), (278, 75430), (380, 55183), (397, 52820), (556, 37715), (695, 30172), (794, 26410), (1390, 15086), (1588, 13205), (1985, 10564), (2641, 7940), (2780, 7543), (3970, 5282)]