28280780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128549}}^1$

素因数の和:128569

約数の個数: 24

約数和(自身を含む): 64789200

約数和(自身を除く): 36508420

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 128549, 257098, 514196, 642745, 1285490, 1414039, 2570980, 2828078, 5656156, 7070195, 14140390, 28280780]

約数ペア:

[(1, 28280780), (2, 14140390), (4, 7070195), (5, 5656156), (10, 2828078), (11, 2570980), (20, 1414039), (22, 1285490), (44, 642745), (55, 514196), (110, 257098), (220, 128549)]