199904840

素因数分解:

$2^3\times 5^1\times {\mathrm{4997621}}^1$

素因数の和:4997632

約数の個数: 16

約数和(自身を含む): 449785980

約数和(自身を除く): 249881140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4997621, 9995242, 19990484, 24988105, 39980968, 49976210, 99952420, 199904840]

約数ペア:

[(1, 199904840), (2, 99952420), (4, 49976210), (5, 39980968), (8, 24988105), (10, 19990484), (20, 9995242), (40, 4997621)]