19884680

素因数分解:

$2^3\times 5^1\times {\mathrm{497117}}^1$

素因数の和:497128

約数の個数: 16

約数和(自身を含む): 44740620

約数和(自身を除く): 24855940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497117, 994234, 1988468, 2485585, 3976936, 4971170, 9942340, 19884680]

約数ペア:

[(1, 19884680), (2, 9942340), (4, 4971170), (5, 3976936), (8, 2485585), (10, 1988468), (20, 994234), (40, 497117)]