21000643244

素因数分解:

$2^2\times 7^2\times {\mathrm{409}}^1\times {\mathrm{261971}}^1$

素因数の和:262398

約数の個数: 36

約数和(自身を含む): 42855999480

約数和(自身を除く): 21855356236

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 409, 818, 1636, 2863, 5726, 11452, 20041, 40082, 80164, 261971, 523942, 1047884, 1833797, 3667594, 7335188, 12836579, 25673158, 51346316, 107146139, 214292278, 428584556, 750022973, 1500045946, 3000091892, 5250160811, 10500321622, 21000643244]

約数ペア:

[(1, 21000643244), (2, 10500321622), (4, 5250160811), (7, 3000091892), (14, 1500045946), (28, 750022973), (49, 428584556), (98, 214292278), (196, 107146139), (409, 51346316), (818, 25673158), (1636, 12836579), (2863, 7335188), (5726, 3667594), (11452, 1833797), (20041, 1047884), (40082, 523942), (80164, 261971)]