19991187

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{907}}^1$

素因数の和:1023

約数の個数: 24

約数和(自身を含む): 30218240

約数和(自身を除く): 10227053

約数列:

[1, 3, 9, 31, 79, 93, 237, 279, 711, 907, 2449, 2721, 7347, 8163, 22041, 28117, 71653, 84351, 214959, 253053, 644877, 2221243, 6663729, 19991187]

約数ペア:

[(1, 19991187), (3, 6663729), (9, 2221243), (31, 644877), (79, 253053), (93, 214959), (237, 84351), (279, 71653), (711, 28117), (907, 22041), (2449, 8163), (2721, 7347)]