21000304840

素因数分解:

$2^3\times 5^1\times {\mathrm{191}}^1\times {\mathrm{2748731}}^1$

素因数の和:2748933

約数の個数: 32

約数和(自身を含む): 47498088960

約数和(自身を除く): 26497784120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 3820, 7640, 2748731, 5497462, 10994924, 13743655, 21989848, 27487310, 54974620, 109949240, 525007621, 1050015242, 2100030484, 2625038105, 4200060968, 5250076210, 10500152420, 21000304840]

約数ペア:

[(1, 21000304840), (2, 10500152420), (4, 5250076210), (5, 4200060968), (8, 2625038105), (10, 2100030484), (20, 1050015242), (40, 525007621), (191, 109949240), (382, 54974620), (764, 27487310), (955, 21989848), (1528, 13743655), (1910, 10994924), (3820, 5497462), (7640, 2748731)]