20201921

素因数分解:

${\mathrm{19}}^2\times {\mathrm{107}}^1\times {\mathrm{523}}^1$

素因数の和:668

約数の個数: 12

約数和(自身を含む): 21561552

約数和(自身を除く): 1359631

約数列:

[1, 19, 107, 361, 523, 2033, 9937, 38627, 55961, 188803, 1063259, 20201921]

約数ペア:

[(1, 20201921), (19, 1063259), (107, 188803), (361, 55961), (523, 38627), (2033, 9937)]