18987765

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1171}}^1$

素因数の和:1249

約数の個数: 32

約数和(自身を含む): 32403456

約数和(自身を除く): 13415691

約数列:

[1, 3, 5, 15, 23, 47, 69, 115, 141, 235, 345, 705, 1081, 1171, 3243, 3513, 5405, 5855, 16215, 17565, 26933, 55037, 80799, 134665, 165111, 275185, 403995, 825555, 1265851, 3797553, 6329255, 18987765]

約数ペア:

[(1, 18987765), (3, 6329255), (5, 3797553), (15, 1265851), (23, 825555), (47, 403995), (69, 275185), (115, 165111), (141, 134665), (235, 80799), (345, 55037), (705, 26933), (1081, 17565), (1171, 16215), (3243, 5855), (3513, 5405)]