19978941

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{1753}}^1$

素因数の和:1916

約数の個数: 16

約数和(自身を含む): 27783360

約数和(自身を除く): 7804419

約数列:

[1, 3, 29, 87, 131, 393, 1753, 3799, 5259, 11397, 50837, 152511, 229643, 688929, 6659647, 19978941]

約数ペア:

[(1, 19978941), (3, 6659647), (29, 688929), (87, 229643), (131, 152511), (393, 50837), (1753, 11397), (3799, 5259)]