21615538

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67129}}^1$

素因数の和:67161

約数の個数: 16

約数和(自身を含む): 38666880

約数和(自身を除く): 17051342

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 67129, 134258, 469903, 939806, 1543967, 3087934, 10807769, 21615538]

約数ペア:

[(1, 21615538), (2, 10807769), (7, 3087934), (14, 1543967), (23, 939806), (46, 469903), (161, 134258), (322, 67129)]