20842280

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1493}}^1$

素因数の和:1853

約数の個数: 32

約数和(自身を含む): 47061000

約数和(自身を除く): 26218720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1493, 1745, 2792, 2986, 3490, 5972, 6980, 7465, 11944, 13960, 14930, 29860, 59720, 521057, 1042114, 2084228, 2605285, 4168456, 5210570, 10421140, 20842280]

約数ペア:

[(1, 20842280), (2, 10421140), (4, 5210570), (5, 4168456), (8, 2605285), (10, 2084228), (20, 1042114), (40, 521057), (349, 59720), (698, 29860), (1396, 14930), (1493, 13960), (1745, 11944), (2792, 7465), (2986, 6980), (3490, 5972)]