81423654

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:345

約数の個数: 64

約数和(自身を含む): 181030080

約数和(自身を除く): 99606426

約数列:

[1, 2, 3, 6, 13, 26, 39, 61, 78, 109, 122, 157, 183, 218, 314, 327, 366, 471, 654, 793, 942, 1417, 1586, 2041, 2379, 2834, 4082, 4251, 4758, 6123, 6649, 8502, 9577, 12246, 13298, 17113, 19154, 19947, 28731, 34226, 39894, 51339, 57462, 86437, 102678, 124501, 172874, 222469, 249002, 259311, 373503, 444938, 518622, 667407, 747006, 1043893, 1334814, 2087786, 3131679, 6263358, 13570609, 27141218, 40711827, 81423654]

約数ペア:

[(1, 81423654), (2, 40711827), (3, 27141218), (6, 13570609), (13, 6263358), (26, 3131679), (39, 2087786), (61, 1334814), (78, 1043893), (109, 747006), (122, 667407), (157, 518622), (183, 444938), (218, 373503), (314, 259311), (327, 249002), (366, 222469), (471, 172874), (654, 124501), (793, 102678), (942, 86437), (1417, 57462), (1586, 51339), (2041, 39894), (2379, 34226), (2834, 28731), (4082, 19947), (4251, 19154), (4758, 17113), (6123, 13298), (6649, 12246), (8502, 9577)]