21555149

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:258

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 6956851

約数列:

[1, 7, 11, 29, 49, 77, 197, 203, 319, 343, 539, 1379, 1421, 2167, 2233, 3773, 5713, 9653, 9947, 15169, 15631, 39991, 62843, 67571, 106183, 109417, 279937, 439901, 743281, 1959559, 3079307, 21555149]

約数ペア:

[(1, 21555149), (7, 3079307), (11, 1959559), (29, 743281), (49, 439901), (77, 279937), (197, 109417), (203, 106183), (319, 67571), (343, 62843), (539, 39991), (1379, 15631), (1421, 15169), (2167, 9947), (2233, 9653), (3773, 5713)]