19881543

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{857}}^1$

素因数の和:927

約数の個数: 32

約数和(自身を含む): 31299840

約数和(自身を除く): 11418297

約数列:

[1, 3, 11, 19, 33, 37, 57, 111, 209, 407, 627, 703, 857, 1221, 2109, 2571, 7733, 9427, 16283, 23199, 28281, 31709, 48849, 95127, 179113, 348799, 537339, 602471, 1046397, 1807413, 6627181, 19881543]

約数ペア:

[(1, 19881543), (3, 6627181), (11, 1807413), (19, 1046397), (33, 602471), (37, 537339), (57, 348799), (111, 179113), (209, 95127), (407, 48849), (627, 31709), (703, 28281), (857, 23199), (1221, 16283), (2109, 9427), (2571, 7733)]