201721289

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{1381}}^1$

素因数の和:1677

約数の個数: 24

約数和(自身を含む): 257118336

約数和(自身を除く): 55397047

約数列:

[1, 7, 11, 49, 77, 271, 539, 1381, 1897, 2981, 9667, 13279, 15191, 20867, 67669, 106337, 146069, 374251, 744359, 2619757, 4116761, 18338299, 28817327, 201721289]

約数ペア:

[(1, 201721289), (7, 28817327), (11, 18338299), (49, 4116761), (77, 2619757), (271, 744359), (539, 374251), (1381, 146069), (1897, 106337), (2981, 67669), (9667, 20867), (13279, 15191)]