28291780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128599}}^1$

素因数の和:128619

約数の個数: 24

約数和(自身を含む): 64814400

約数和(自身を除く): 36522620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 128599, 257198, 514396, 642995, 1285990, 1414589, 2571980, 2829178, 5658356, 7072945, 14145890, 28291780]

約数ペア:

[(1, 28291780), (2, 14145890), (4, 7072945), (5, 5658356), (10, 2829178), (11, 2571980), (20, 1414589), (22, 1285990), (44, 642995), (55, 514396), (110, 257198), (220, 128599)]