21991047

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{809}}^1$

素因数の和:883

約数の個数: 32

約数和(自身を含む): 34292160

約数和(自身を除く): 12301113

約数列:

[1, 3, 13, 17, 39, 41, 51, 123, 221, 533, 663, 697, 809, 1599, 2091, 2427, 9061, 10517, 13753, 27183, 31551, 33169, 41259, 99507, 178789, 431197, 536367, 563873, 1293591, 1691619, 7330349, 21991047]

約数ペア:

[(1, 21991047), (3, 7330349), (13, 1691619), (17, 1293591), (39, 563873), (41, 536367), (51, 431197), (123, 178789), (221, 99507), (533, 41259), (663, 33169), (697, 31551), (809, 27183), (1599, 13753), (2091, 10517), (2427, 9061)]