20881136

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{229}}^1$

素因数の和:417

約数の個数: 40

約数和(自身を含む): 41924400

約数和(自身を除く): 21043264

約数列:

[1, 2, 4, 8, 16, 41, 82, 139, 164, 229, 278, 328, 458, 556, 656, 916, 1112, 1832, 2224, 3664, 5699, 9389, 11398, 18778, 22796, 31831, 37556, 45592, 63662, 75112, 91184, 127324, 150224, 254648, 509296, 1305071, 2610142, 5220284, 10440568, 20881136]

約数ペア:

[(1, 20881136), (2, 10440568), (4, 5220284), (8, 2610142), (16, 1305071), (41, 509296), (82, 254648), (139, 150224), (164, 127324), (229, 91184), (278, 75112), (328, 63662), (458, 45592), (556, 37556), (656, 31831), (916, 22796), (1112, 18778), (1832, 11398), (2224, 9389), (3664, 5699)]