28128760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{63929}}^1$

素因数の和:63951

約数の個数: 32

約数和(自身を含む): 69044400

約数和(自身を除く): 40915640

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 63929, 127858, 255716, 319645, 511432, 639290, 703219, 1278580, 1406438, 2557160, 2812876, 3516095, 5625752, 7032190, 14064380, 28128760]

約数ペア:

[(1, 28128760), (2, 14064380), (4, 7032190), (5, 5625752), (8, 3516095), (10, 2812876), (11, 2557160), (20, 1406438), (22, 1278580), (40, 703219), (44, 639290), (55, 511432), (88, 319645), (110, 255716), (220, 127858), (440, 63929)]