21207207

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{359}}^1$

素因数の和:495

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12661593

約数列:

[1, 3, 7, 21, 29, 87, 97, 203, 291, 359, 609, 679, 1077, 2037, 2513, 2813, 7539, 8439, 10411, 19691, 31233, 34823, 59073, 72877, 104469, 218631, 243761, 731283, 1009867, 3029601, 7069069, 21207207]

約数ペア:

[(1, 21207207), (3, 7069069), (7, 3029601), (21, 1009867), (29, 731283), (87, 243761), (97, 218631), (203, 104469), (291, 72877), (359, 59073), (609, 34823), (679, 31233), (1077, 19691), (2037, 10411), (2513, 8439), (2813, 7539)]