19187721

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{2017}}^1$

素因数の和:2181

約数の個数: 24

約数和(自身を含む): 31900544

約数和(自身を除く): 12712823

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 1057, 1359, 2017, 3171, 6051, 9513, 14119, 18153, 42357, 127071, 304567, 913701, 2131969, 2741103, 6395907, 19187721]

約数ペア:

[(1, 19187721), (3, 6395907), (7, 2741103), (9, 2131969), (21, 913701), (63, 304567), (151, 127071), (453, 42357), (1057, 18153), (1359, 14119), (2017, 9513), (3171, 6051)]