21006513

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{70729}}^1$

素因数の和:70749

約数の個数: 16

約数和(自身を含む): 33950400

約数和(自身を除く): 12943887

約数列:

[1, 3, 9, 11, 27, 33, 99, 297, 70729, 212187, 636561, 778019, 1909683, 2334057, 7002171, 21006513]

約数ペア:

[(1, 21006513), (3, 7002171), (9, 2334057), (11, 1909683), (27, 778019), (33, 636561), (99, 212187), (297, 70729)]