21272949

素因数分解:

$3^7\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 32590080

約数和(自身を除く): 11317131

約数列:

[1, 3, 9, 27, 71, 81, 137, 213, 243, 411, 639, 729, 1233, 1917, 2187, 3699, 5751, 9727, 11097, 17253, 29181, 33291, 51759, 87543, 99873, 155277, 262629, 299619, 787887, 2363661, 7090983, 21272949]

約数ペア:

[(1, 21272949), (3, 7090983), (9, 2363661), (27, 787887), (71, 299619), (81, 262629), (137, 155277), (213, 99873), (243, 87543), (411, 51759), (639, 33291), (729, 29181), (1233, 17253), (1917, 11097), (2187, 9727), (3699, 5751)]