20405487

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1\times {\mathrm{1321}}^1$

素因数の和:1614

約数の個数: 16

約数和(自身を含む): 28766720

約数和(自身を除く): 8361233

約数列:

[1, 3, 19, 57, 271, 813, 1321, 3963, 5149, 15447, 25099, 75297, 357991, 1073973, 6801829, 20405487]

約数ペア:

[(1, 20405487), (3, 6801829), (19, 1073973), (57, 357991), (271, 75297), (813, 25099), (1321, 15447), (3963, 5149)]