21995259

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 35750400

約数和(自身を除く): 13755141

約数列:

[1, 3, 11, 13, 33, 39, 59, 79, 121, 143, 177, 237, 363, 429, 649, 767, 869, 1027, 1573, 1947, 2301, 2607, 3081, 4661, 4719, 7139, 8437, 9559, 11297, 13983, 21417, 25311, 28677, 33891, 51271, 60593, 92807, 124267, 153813, 181779, 278421, 372801, 563981, 666523, 1691943, 1999569, 7331753, 21995259]

約数ペア:

[(1, 21995259), (3, 7331753), (11, 1999569), (13, 1691943), (33, 666523), (39, 563981), (59, 372801), (79, 278421), (121, 181779), (143, 153813), (177, 124267), (237, 92807), (363, 60593), (429, 51271), (649, 33891), (767, 28677), (869, 25311), (1027, 21417), (1573, 13983), (1947, 11297), (2301, 9559), (2607, 8437), (3081, 7139), (4661, 4719)]