21325936

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:413

約数の個数: 40

約数和(自身を含む): 42775040

約数和(自身を除く): 21449104

約数列:

[1, 2, 4, 8, 16, 43, 86, 139, 172, 223, 278, 344, 446, 556, 688, 892, 1112, 1784, 2224, 3568, 5977, 9589, 11954, 19178, 23908, 30997, 38356, 47816, 61994, 76712, 95632, 123988, 153424, 247976, 495952, 1332871, 2665742, 5331484, 10662968, 21325936]

約数ペア:

[(1, 21325936), (2, 10662968), (4, 5331484), (8, 2665742), (16, 1332871), (43, 495952), (86, 247976), (139, 153424), (172, 123988), (223, 95632), (278, 76712), (344, 61994), (446, 47816), (556, 38356), (688, 30997), (892, 23908), (1112, 19178), (1784, 11954), (2224, 9589), (3568, 5977)]