20911209

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{27551}}^1$

素因数の和:27588

約数の個数: 16

約数和(自身を含む): 31739904

約数和(自身を除く): 10828695

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 27551, 82653, 303061, 633673, 909183, 1901019, 6970403, 20911209]

約数ペア:

[(1, 20911209), (3, 6970403), (11, 1901019), (23, 909183), (33, 633673), (69, 303061), (253, 82653), (759, 27551)]