20689557

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{641}}^1$

素因数の和:733

約数の個数: 32

約数和(自身を含む): 33281280

約数和(自身を除く): 12591723

約数列:

[1, 3, 7, 21, 29, 53, 87, 159, 203, 371, 609, 641, 1113, 1537, 1923, 4487, 4611, 10759, 13461, 18589, 32277, 33973, 55767, 101919, 130123, 237811, 390369, 713433, 985217, 2955651, 6896519, 20689557]

約数ペア:

[(1, 20689557), (3, 6896519), (7, 2955651), (21, 985217), (29, 713433), (53, 390369), (87, 237811), (159, 130123), (203, 101919), (371, 55767), (609, 33973), (641, 32277), (1113, 18589), (1537, 13461), (1923, 10759), (4487, 4611)]