20503420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1069}}^1$

素因数の和:1222

約数の個数: 48

約数和(自身を含む): 49613760

約数和(自身を除く): 29110340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 137, 140, 274, 548, 685, 959, 1069, 1370, 1918, 2138, 2740, 3836, 4276, 4795, 5345, 7483, 9590, 10690, 14966, 19180, 21380, 29932, 37415, 74830, 146453, 149660, 292906, 585812, 732265, 1025171, 1464530, 2050342, 2929060, 4100684, 5125855, 10251710, 20503420]

約数ペア:

[(1, 20503420), (2, 10251710), (4, 5125855), (5, 4100684), (7, 2929060), (10, 2050342), (14, 1464530), (20, 1025171), (28, 732265), (35, 585812), (70, 292906), (137, 149660), (140, 146453), (274, 74830), (548, 37415), (685, 29932), (959, 21380), (1069, 19180), (1370, 14966), (1918, 10690), (2138, 9590), (2740, 7483), (3836, 5345), (4276, 4795)]