20787981

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{239}}^1\times {\mathrm{367}}^1$

素因数の和:688

約数の個数: 16

約数和(自身を含む): 28262400

約数和(自身を除く): 7474419

約数列:

[1, 3, 79, 237, 239, 367, 717, 1101, 18881, 28993, 56643, 86979, 87713, 263139, 6929327, 20787981]

約数ペア:

[(1, 20787981), (3, 6929327), (79, 263139), (237, 87713), (239, 86979), (367, 56643), (717, 28993), (1101, 18881)]