19901187

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{439}}^1$

素因数の和:544

約数の個数: 32

約数和(自身を含む): 31257600

約数和(自身を除く): 11356413

約数列:

[1, 3, 9, 23, 27, 69, 73, 207, 219, 439, 621, 657, 1317, 1679, 1971, 3951, 5037, 10097, 11853, 15111, 30291, 32047, 45333, 90873, 96141, 272619, 288423, 737081, 865269, 2211243, 6633729, 19901187]

約数ペア:

[(1, 19901187), (3, 6633729), (9, 2211243), (23, 865269), (27, 737081), (69, 288423), (73, 272619), (207, 96141), (219, 90873), (439, 45333), (621, 32047), (657, 30291), (1317, 15111), (1679, 11853), (1971, 10097), (3951, 5037)]