21512883

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53917}}^1$

素因数の和:53946

約数の個数: 16

約数和(自身を含む): 34507520

約数和(自身を除く): 12994637

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53917, 161751, 377419, 1024423, 1132257, 3073269, 7170961, 21512883]

約数ペア:

[(1, 21512883), (3, 7170961), (7, 3073269), (19, 1132257), (21, 1024423), (57, 377419), (133, 161751), (399, 53917)]