21126819

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{307}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 12580701

約数列:

[1, 3, 7, 21, 29, 87, 113, 203, 307, 339, 609, 791, 921, 2149, 2373, 3277, 6447, 8903, 9831, 22939, 26709, 34691, 62321, 68817, 104073, 186963, 242837, 728511, 1006039, 3018117, 7042273, 21126819]

約数ペア:

[(1, 21126819), (3, 7042273), (7, 3018117), (21, 1006039), (29, 728511), (87, 242837), (113, 186963), (203, 104073), (307, 68817), (339, 62321), (609, 34691), (791, 26709), (921, 22939), (2149, 9831), (2373, 8903), (3277, 6447)]