2178156981

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{725327}}^1$

素因数の和:725361

約数の個数: 32

約数和(自身を含む): 3899363328

約数和(自身を除く): 1721206347

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 77, 91, 143, 231, 273, 429, 1001, 3003, 725327, 2175981, 5077289, 7978597, 9429251, 15231867, 23935791, 28287753, 55850179, 66004757, 103721761, 167550537, 198014271, 311165283, 726052327, 2178156981]

約数ペア:

[(1, 2178156981), (3, 726052327), (7, 311165283), (11, 198014271), (13, 167550537), (21, 103721761), (33, 66004757), (39, 55850179), (77, 28287753), (91, 23935791), (143, 15231867), (231, 9429251), (273, 7978597), (429, 5077289), (1001, 2175981), (3003, 725327)]