21517083

素因数分解:

$3^4\times 7^1\times {\mathrm{137}}^1\times {\mathrm{277}}^1$

素因数の和:433

約数の個数: 40

約数和(自身を含む): 37136352

約数和(自身を除く): 15619269

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 137, 189, 277, 411, 567, 831, 959, 1233, 1939, 2493, 2877, 3699, 5817, 7479, 8631, 11097, 17451, 22437, 25893, 37949, 52353, 77679, 113847, 157059, 265643, 341541, 796929, 1024623, 2390787, 3073869, 7172361, 21517083]

約数ペア:

[(1, 21517083), (3, 7172361), (7, 3073869), (9, 2390787), (21, 1024623), (27, 796929), (63, 341541), (81, 265643), (137, 157059), (189, 113847), (277, 77679), (411, 52353), (567, 37949), (831, 25893), (959, 22437), (1233, 17451), (1939, 11097), (2493, 8631), (2877, 7479), (3699, 5817)]