20667820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{397}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 46136160

約数和(自身を除く): 25468340

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 137, 190, 274, 380, 397, 548, 685, 794, 1370, 1588, 1985, 2603, 2740, 3970, 5206, 7543, 7940, 10412, 13015, 15086, 26030, 30172, 37715, 52060, 54389, 75430, 108778, 150860, 217556, 271945, 543890, 1033391, 1087780, 2066782, 4133564, 5166955, 10333910, 20667820]

約数ペア:

[(1, 20667820), (2, 10333910), (4, 5166955), (5, 4133564), (10, 2066782), (19, 1087780), (20, 1033391), (38, 543890), (76, 271945), (95, 217556), (137, 150860), (190, 108778), (274, 75430), (380, 54389), (397, 52060), (548, 37715), (685, 30172), (794, 26030), (1370, 15086), (1588, 13015), (1985, 10412), (2603, 7940), (2740, 7543), (3970, 5206)]