1291210840

素因数分解:

$2^3\times 5^1\times {\mathrm{509}}^1\times {\mathrm{63419}}^1$

素因数の和:63939

約数の個数: 32

約数和(自身を含む): 2910978000

約数和(自身を除く): 1619767160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 509, 1018, 2036, 2545, 4072, 5090, 10180, 20360, 63419, 126838, 253676, 317095, 507352, 634190, 1268380, 2536760, 32280271, 64560542, 129121084, 161401355, 258242168, 322802710, 645605420, 1291210840]

約数ペア:

[(1, 1291210840), (2, 645605420), (4, 322802710), (5, 258242168), (8, 161401355), (10, 129121084), (20, 64560542), (40, 32280271), (509, 2536760), (1018, 1268380), (2036, 634190), (2545, 507352), (4072, 317095), (5090, 253676), (10180, 126838), (20360, 63419)]