21880784

素因数分解:

$2^4\times {\mathrm{277}}^1\times {\mathrm{4937}}^1$

素因数の和:5222

約数の個数: 20

約数和(自身を含む): 42555684

約数和(自身を除く): 20674900

約数列:

[1, 2, 4, 8, 16, 277, 554, 1108, 2216, 4432, 4937, 9874, 19748, 39496, 78992, 1367549, 2735098, 5470196, 10940392, 21880784]

約数ペア:

[(1, 21880784), (2, 10940392), (4, 5470196), (8, 2735098), (16, 1367549), (277, 78992), (554, 39496), (1108, 19748), (2216, 9874), (4432, 4937)]