21243189

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{61}}^2\times {\mathrm{173}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 31595616

約数和(自身を除く): 10352427

約数列:

[1, 3, 11, 33, 61, 173, 183, 519, 671, 1903, 2013, 3721, 5709, 10553, 11163, 31659, 40931, 116083, 122793, 348249, 643733, 1931199, 7081063, 21243189]

約数ペア:

[(1, 21243189), (3, 7081063), (11, 1931199), (33, 643733), (61, 348249), (173, 122793), (183, 116083), (519, 40931), (671, 31659), (1903, 11163), (2013, 10553), (3721, 5709)]