21175819

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1\times {\mathrm{277}}^1$

素因数の和:514

約数の個数: 16

約数和(自身を含む): 24802048

約数和(自身を除く): 3626229

約数列:

[1, 7, 67, 163, 277, 469, 1141, 1939, 10921, 18559, 45151, 76447, 129913, 316057, 3025117, 21175819]

約数ペア:

[(1, 21175819), (7, 3025117), (67, 316057), (163, 129913), (277, 76447), (469, 45151), (1141, 18559), (1939, 10921)]