21391967

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{643}}^1$

素因数の和:782

約数の個数: 16

約数和(自身を含む): 24111360

約数和(自身を除く): 2719393

約数列:

[1, 17, 19, 103, 323, 643, 1751, 1957, 10931, 12217, 33269, 66229, 207689, 1125893, 1258351, 21391967]

約数ペア:

[(1, 21391967), (17, 1258351), (19, 1125893), (103, 207689), (323, 66229), (643, 33269), (1751, 12217), (1957, 10931)]