20678518

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{431}}^1$

素因数の和:612

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 16646282

約数列:

[1, 2, 7, 14, 23, 46, 149, 161, 298, 322, 431, 862, 1043, 2086, 3017, 3427, 6034, 6854, 9913, 19826, 23989, 47978, 64219, 69391, 128438, 138782, 449533, 899066, 1477037, 2954074, 10339259, 20678518]

約数ペア:

[(1, 20678518), (2, 10339259), (7, 2954074), (14, 1477037), (23, 899066), (46, 449533), (149, 138782), (161, 128438), (298, 69391), (322, 64219), (431, 47978), (862, 23989), (1043, 19826), (2086, 9913), (3017, 6854), (3427, 6034)]