21561771

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{3011}}^1$

素因数の和:3063

約数の個数: 32

約数和(自身を含む): 37011456

約数和(自身を除く): 15449685

約数列:

[1, 3, 7, 11, 21, 31, 33, 77, 93, 217, 231, 341, 651, 1023, 2387, 3011, 7161, 9033, 21077, 33121, 63231, 93341, 99363, 231847, 280023, 653387, 695541, 1026751, 1960161, 3080253, 7187257, 21561771]

約数ペア:

[(1, 21561771), (3, 7187257), (7, 3080253), (11, 1960161), (21, 1026751), (31, 695541), (33, 653387), (77, 280023), (93, 231847), (217, 99363), (231, 93341), (341, 63231), (651, 33121), (1023, 21077), (2387, 9033), (3011, 7161)]