20490309

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 35942400

約数和(自身を除く): 15452091

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 79, 161, 179, 207, 237, 483, 537, 553, 711, 1253, 1449, 1611, 1659, 1817, 3759, 4117, 4977, 5451, 11277, 12351, 12719, 14141, 16353, 28819, 37053, 38157, 42423, 86457, 98987, 114471, 127269, 259371, 296961, 325243, 890883, 975729, 2276701, 2927187, 6830103, 20490309]

約数ペア:

[(1, 20490309), (3, 6830103), (7, 2927187), (9, 2276701), (21, 975729), (23, 890883), (63, 325243), (69, 296961), (79, 259371), (161, 127269), (179, 114471), (207, 98987), (237, 86457), (483, 42423), (537, 38157), (553, 37053), (711, 28819), (1253, 16353), (1449, 14141), (1611, 12719), (1659, 12351), (1817, 11277), (3759, 5451), (4117, 4977)]