21081478

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{683}}^1$

素因数の和:780

約数の個数: 32

約数和(自身を含む): 36640512

約数和(自身を除く): 15559034

約数列:

[1, 2, 11, 22, 23, 46, 61, 122, 253, 506, 671, 683, 1342, 1366, 1403, 2806, 7513, 15026, 15433, 15709, 30866, 31418, 41663, 83326, 172799, 345598, 458293, 916586, 958249, 1916498, 10540739, 21081478]

約数ペア:

[(1, 21081478), (2, 10540739), (11, 1916498), (22, 958249), (23, 916586), (46, 458293), (61, 345598), (122, 172799), (253, 83326), (506, 41663), (671, 31418), (683, 30866), (1342, 15709), (1366, 15433), (1403, 15026), (2806, 7513)]