18991905

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{55049}}^1$

素因数の和:55080

約数の個数: 16

約数和(自身を含む): 31708800

約数和(自身を除く): 12716895

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 55049, 165147, 275245, 825735, 1266127, 3798381, 6330635, 18991905]

約数ペア:

[(1, 18991905), (3, 6330635), (5, 3798381), (15, 1266127), (23, 825735), (69, 275245), (115, 165147), (345, 55049)]