19998069

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 36126720

約数和(自身を除く): 16128651

約数列:

[1, 3, 7, 13, 17, 21, 31, 39, 51, 91, 93, 119, 139, 217, 221, 273, 357, 403, 417, 527, 651, 663, 973, 1209, 1547, 1581, 1807, 2363, 2821, 2919, 3689, 4309, 4641, 5421, 6851, 7089, 8463, 11067, 12649, 12927, 16541, 20553, 30163, 30719, 37947, 47957, 49623, 56017, 73253, 90489, 92157, 143871, 168051, 215033, 219759, 392119, 512771, 645099, 952289, 1176357, 1538313, 2856867, 6666023, 19998069]

約数ペア:

[(1, 19998069), (3, 6666023), (7, 2856867), (13, 1538313), (17, 1176357), (21, 952289), (31, 645099), (39, 512771), (51, 392119), (91, 219759), (93, 215033), (119, 168051), (139, 143871), (217, 92157), (221, 90489), (273, 73253), (357, 56017), (403, 49623), (417, 47957), (527, 37947), (651, 30719), (663, 30163), (973, 20553), (1209, 16541), (1547, 12927), (1581, 12649), (1807, 11067), (2363, 8463), (2821, 7089), (2919, 6851), (3689, 5421), (4309, 4641)]