21421768

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{157513}}^1$

素因数の和:157536

約数の個数: 16

約数和(自身を含む): 42528780

約数和(自身を除く): 21107012

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 157513, 315026, 630052, 1260104, 2677721, 5355442, 10710884, 21421768]

約数ペア:

[(1, 21421768), (2, 10710884), (4, 5355442), (8, 2677721), (17, 1260104), (34, 630052), (68, 315026), (136, 157513)]