21987959

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{5333}}^1$

素因数の和:5390

約数の個数: 16

約数和(自身を含む): 27310080

約数和(自身を除く): 5322121

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 5333, 37331, 101327, 165323, 709289, 1157261, 3141137, 21987959]

約数ペア:

[(1, 21987959), (7, 3141137), (19, 1157261), (31, 709289), (133, 165323), (217, 101327), (589, 37331), (4123, 5333)]