19664980

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7177}}^1$

素因数の和:7323

約数の個数: 24

約数和(自身を含む): 41603688

約数和(自身を除く): 21938708

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7177, 14354, 28708, 35885, 71770, 143540, 983249, 1966498, 3932996, 4916245, 9832490, 19664980]

約数ペア:

[(1, 19664980), (2, 9832490), (4, 4916245), (5, 3932996), (10, 1966498), (20, 983249), (137, 143540), (274, 71770), (548, 35885), (685, 28708), (1370, 14354), (2740, 7177)]