21315885

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{193}}^1\times {\mathrm{199}}^1$

素因数の和:437

約数の個数: 32

約数和(自身を含む): 35385600

約数和(自身を除く): 14069715

約数列:

[1, 3, 5, 15, 37, 111, 185, 193, 199, 555, 579, 597, 965, 995, 2895, 2985, 7141, 7363, 21423, 22089, 35705, 36815, 38407, 107115, 110445, 115221, 192035, 576105, 1421059, 4263177, 7105295, 21315885]

約数ペア:

[(1, 21315885), (3, 7105295), (5, 4263177), (15, 1421059), (37, 576105), (111, 192035), (185, 115221), (193, 110445), (199, 107115), (555, 38407), (579, 36815), (597, 35705), (965, 22089), (995, 21423), (2895, 7363), (2985, 7141)]