21393218

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{138917}}^1$

素因数の和:138937

約数の個数: 16

約数和(自身を含む): 40008384

約数和(自身を除く): 18615166

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 138917, 277834, 972419, 1528087, 1944838, 3056174, 10696609, 21393218]

約数ペア:

[(1, 21393218), (2, 10696609), (7, 3056174), (11, 1944838), (14, 1528087), (22, 972419), (77, 277834), (154, 138917)]