21540207

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{613}}^1$

素因数の和:699

約数の個数: 32

約数和(自身を含む): 33421248

約数和(自身を除く): 11881041

約数列:

[1, 3, 13, 17, 39, 51, 53, 159, 221, 613, 663, 689, 901, 1839, 2067, 2703, 7969, 10421, 11713, 23907, 31263, 32489, 35139, 97467, 135473, 406419, 422357, 552313, 1267071, 1656939, 7180069, 21540207]

約数ペア:

[(1, 21540207), (3, 7180069), (13, 1656939), (17, 1267071), (39, 552313), (51, 422357), (53, 406419), (159, 135473), (221, 97467), (613, 35139), (663, 32489), (689, 31263), (901, 23907), (1839, 11713), (2067, 10421), (2703, 7969)]