21587812

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{947}}^1$

素因数の和:1131

約数の個数: 24

約数和(自身を含む): 39019680

約数和(自身を除く): 17431868

約数列:

[1, 2, 4, 41, 82, 139, 164, 278, 556, 947, 1894, 3788, 5699, 11398, 22796, 38827, 77654, 131633, 155308, 263266, 526532, 5396953, 10793906, 21587812]

約数ペア:

[(1, 21587812), (2, 10793906), (4, 5396953), (41, 526532), (82, 263266), (139, 155308), (164, 131633), (278, 77654), (556, 38827), (947, 22796), (1894, 11398), (3788, 5699)]