21538143

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1051}}^1$

素因数の和:1097

約数の個数: 40

約数和(自身を含む): 36660096

約数和(自身を除く): 15121953

約数列:

[1, 3, 9, 11, 23, 27, 33, 69, 81, 99, 207, 253, 297, 621, 759, 891, 1051, 1863, 2277, 3153, 6831, 9459, 11561, 20493, 24173, 28377, 34683, 72519, 85131, 104049, 217557, 265903, 312147, 652671, 797709, 936441, 1958013, 2393127, 7179381, 21538143]

約数ペア:

[(1, 21538143), (3, 7179381), (9, 2393127), (11, 1958013), (23, 936441), (27, 797709), (33, 652671), (69, 312147), (81, 265903), (99, 217557), (207, 104049), (253, 85131), (297, 72519), (621, 34683), (759, 28377), (891, 24173), (1051, 20493), (1863, 11561), (2277, 9459), (3153, 6831)]