21870219

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{4021}}^1$

素因数の和:4075

約数の個数: 24

約数和(自身を含む): 34846608

約数和(自身を除く): 12976389

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 4021, 5439, 12063, 28147, 84441, 148777, 197029, 446331, 591087, 1041439, 3124317, 7290073, 21870219]

約数ペア:

[(1, 21870219), (3, 7290073), (7, 3124317), (21, 1041439), (37, 591087), (49, 446331), (111, 197029), (147, 148777), (259, 84441), (777, 28147), (1813, 12063), (4021, 5439)]