20983695

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:176

約数の個数: 64

約数和(自身を含む): 38568960

約数和(自身を除く): 17585265

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 61, 71, 85, 95, 183, 213, 255, 285, 305, 323, 355, 915, 969, 1037, 1065, 1159, 1207, 1349, 1615, 3111, 3477, 3621, 4047, 4331, 4845, 5185, 5795, 6035, 6745, 12993, 15555, 17385, 18105, 19703, 20235, 21655, 22933, 59109, 64965, 68799, 73627, 82289, 98515, 114665, 220881, 246867, 295545, 343995, 368135, 411445, 1104405, 1234335, 1398913, 4196739, 6994565, 20983695]

約数ペア:

[(1, 20983695), (3, 6994565), (5, 4196739), (15, 1398913), (17, 1234335), (19, 1104405), (51, 411445), (57, 368135), (61, 343995), (71, 295545), (85, 246867), (95, 220881), (183, 114665), (213, 98515), (255, 82289), (285, 73627), (305, 68799), (323, 64965), (355, 59109), (915, 22933), (969, 21655), (1037, 20235), (1065, 19703), (1159, 18105), (1207, 17385), (1349, 15555), (1615, 12993), (3111, 6745), (3477, 6035), (3621, 5795), (4047, 5185), (4331, 4845)]