21557547

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{12809}}^1$

素因数の和:12843

約数の個数: 24

約数和(自身を含む): 35970480

約数和(自身を除く): 14412933

約数列:

[1, 3, 9, 11, 17, 33, 51, 99, 153, 187, 561, 1683, 12809, 38427, 115281, 140899, 217753, 422697, 653259, 1268091, 1959777, 2395283, 7185849, 21557547]

約数ペア:

[(1, 21557547), (3, 7185849), (9, 2395283), (11, 1959777), (17, 1268091), (33, 653259), (51, 422697), (99, 217753), (153, 140899), (187, 115281), (561, 38427), (1683, 12809)]