20780715

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{227}}^1\times {\mathrm{359}}^1$

素因数の和:611

約数の個数: 32

約数和(自身を含む): 35458560

約数和(自身を除く): 14677845

約数列:

[1, 3, 5, 15, 17, 51, 85, 227, 255, 359, 681, 1077, 1135, 1795, 3405, 3859, 5385, 6103, 11577, 18309, 19295, 30515, 57885, 81493, 91545, 244479, 407465, 1222395, 1385381, 4156143, 6926905, 20780715]

約数ペア:

[(1, 20780715), (3, 6926905), (5, 4156143), (15, 1385381), (17, 1222395), (51, 407465), (85, 244479), (227, 91545), (255, 81493), (359, 57885), (681, 30515), (1077, 19295), (1135, 18309), (1795, 11577), (3405, 6103), (3859, 5385)]