21198969

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{521}}^1$

素因数の和:678

約数の個数: 32

約数和(自身を含む): 34577280

約数和(自身を除く): 13378311

約数列:

[1, 3, 9, 11, 27, 33, 99, 137, 297, 411, 521, 1233, 1507, 1563, 3699, 4521, 4689, 5731, 13563, 14067, 17193, 40689, 51579, 71377, 154737, 214131, 642393, 785147, 1927179, 2355441, 7066323, 21198969]

約数ペア:

[(1, 21198969), (3, 7066323), (9, 2355441), (11, 1927179), (27, 785147), (33, 642393), (99, 214131), (137, 154737), (297, 71377), (411, 51579), (521, 40689), (1233, 17193), (1507, 14067), (1563, 13563), (3699, 5731), (4521, 4689)]