20871557

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{6823}}^1$

素因数の和:6872

約数の個数: 16

約数和(自身を含む): 26204160

約数和(自身を除く): 5332603

約数列:

[1, 7, 19, 23, 133, 161, 437, 3059, 6823, 47761, 129637, 156929, 907459, 1098503, 2981651, 20871557]

約数ペア:

[(1, 20871557), (7, 2981651), (19, 1098503), (23, 907459), (133, 156929), (161, 129637), (437, 47761), (3059, 6823)]