20561135

素因数分解:

$5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{631}}^1$

素因数の和:676

約数の個数: 32

約数和(自身を含む): 30336000

約数和(自身を除く): 9774865

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 343, 631, 665, 931, 1715, 3155, 4417, 4655, 6517, 11989, 22085, 30919, 32585, 59945, 83923, 154595, 216433, 419615, 587461, 1082165, 2937305, 4112227, 20561135]

約数ペア:

[(1, 20561135), (5, 4112227), (7, 2937305), (19, 1082165), (35, 587461), (49, 419615), (95, 216433), (133, 154595), (245, 83923), (343, 59945), (631, 32585), (665, 30919), (931, 22085), (1715, 11989), (3155, 6517), (4417, 4655)]