19400840

素因数分解:

$2^3\times 5^1\times {\mathrm{485021}}^1$

素因数の和:485032

約数の個数: 16

約数和(自身を含む): 43651980

約数和(自身を除く): 24251140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 485021, 970042, 1940084, 2425105, 3880168, 4850210, 9700420, 19400840]

約数ペア:

[(1, 19400840), (2, 9700420), (4, 4850210), (5, 3880168), (8, 2425105), (10, 1940084), (20, 970042), (40, 485021)]