21980881

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1259}}^1$

素因数の和:1368

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 3420719

約数列:

[1, 13, 17, 79, 221, 1027, 1259, 1343, 16367, 17459, 21403, 99461, 278239, 1292993, 1690837, 21980881]

約数ペア:

[(1, 21980881), (13, 1690837), (17, 1292993), (79, 278239), (221, 99461), (1027, 21403), (1259, 17459), (1343, 16367)]