21420003

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{331}}^1$

素因数の和:435

約数の個数: 32

約数和(自身を含む): 32700672

約数和(自身を除く): 11280669

約数列:

[1, 3, 11, 33, 37, 53, 111, 159, 331, 407, 583, 993, 1221, 1749, 1961, 3641, 5883, 10923, 12247, 17543, 21571, 36741, 52629, 64713, 134717, 192973, 404151, 578919, 649091, 1947273, 7140001, 21420003]

約数ペア:

[(1, 21420003), (3, 7140001), (11, 1947273), (33, 649091), (37, 578919), (53, 404151), (111, 192973), (159, 134717), (331, 64713), (407, 52629), (583, 36741), (993, 21571), (1221, 17543), (1749, 12247), (1961, 10923), (3641, 5883)]