21890421

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{9391}}^1$

素因数の和:9441

約数の個数: 24

約数和(自身を含む): 37117184

約数和(自身を除く): 15226763

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 9391, 28173, 65737, 84519, 197211, 347467, 591633, 1042401, 2432269, 3127203, 7296807, 21890421]

約数ペア:

[(1, 21890421), (3, 7296807), (7, 3127203), (9, 2432269), (21, 1042401), (37, 591633), (63, 347467), (111, 197211), (259, 84519), (333, 65737), (777, 28173), (2331, 9391)]