20786440

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1489}}^1$

素因数の和:1849

約数の個数: 32

約数和(自身を含む): 46935000

約数和(自身を除く): 26148560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1489, 1745, 2792, 2978, 3490, 5956, 6980, 7445, 11912, 13960, 14890, 29780, 59560, 519661, 1039322, 2078644, 2598305, 4157288, 5196610, 10393220, 20786440]

約数ペア:

[(1, 20786440), (2, 10393220), (4, 5196610), (5, 4157288), (8, 2598305), (10, 2078644), (20, 1039322), (40, 519661), (349, 59560), (698, 29780), (1396, 14890), (1489, 13960), (1745, 11912), (2792, 7445), (2978, 6980), (3490, 5956)]