21493389

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{541}}^1$

素因数の和:621

約数の個数: 32

約数和(自身を含む): 32780160

約数和(自身を除く): 11286771

約数列:

[1, 3, 17, 19, 41, 51, 57, 123, 323, 541, 697, 779, 969, 1623, 2091, 2337, 9197, 10279, 13243, 22181, 27591, 30837, 39729, 66543, 174743, 377077, 421439, 524229, 1131231, 1264317, 7164463, 21493389]

約数ペア:

[(1, 21493389), (3, 7164463), (17, 1264317), (19, 1131231), (41, 524229), (51, 421439), (57, 377077), (123, 174743), (323, 66543), (541, 39729), (697, 30837), (779, 27591), (969, 22181), (1623, 13243), (2091, 10279), (2337, 9197)]