21398167

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{421}}^1$

素因数の和:618

約数の個数: 16

約数和(自身を含む): 25157952

約数和(自身を除く): 3759785

約数列:

[1, 7, 53, 137, 371, 421, 959, 2947, 7261, 22313, 50827, 57677, 156191, 403739, 3056881, 21398167]

約数ペア:

[(1, 21398167), (7, 3056881), (53, 403739), (137, 156191), (371, 57677), (421, 50827), (959, 22313), (2947, 7261)]