20546980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 45864000

約数和(自身を除く): 25317020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 139, 190, 278, 380, 389, 556, 695, 778, 1390, 1556, 1945, 2641, 2780, 3890, 5282, 7391, 7780, 10564, 13205, 14782, 26410, 29564, 36955, 52820, 54071, 73910, 108142, 147820, 216284, 270355, 540710, 1027349, 1081420, 2054698, 4109396, 5136745, 10273490, 20546980]

約数ペア:

[(1, 20546980), (2, 10273490), (4, 5136745), (5, 4109396), (10, 2054698), (19, 1081420), (20, 1027349), (38, 540710), (76, 270355), (95, 216284), (139, 147820), (190, 108142), (278, 73910), (380, 54071), (389, 52820), (556, 36955), (695, 29564), (778, 26410), (1390, 14782), (1556, 13205), (1945, 10564), (2641, 7780), (2780, 7391), (3890, 5282)]