20407545

素因数分解:

$3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1229}}^1$

素因数の和:1287

約数の個数: 40

約数和(自身を含む): 37505160

約数和(自身を除く): 17097615

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 369, 405, 615, 1107, 1229, 1845, 3321, 3687, 5535, 6145, 11061, 16605, 18435, 33183, 50389, 55305, 99549, 151167, 165915, 251945, 453501, 497745, 755835, 1360503, 2267505, 4081509, 6802515, 20407545]

約数ペア:

[(1, 20407545), (3, 6802515), (5, 4081509), (9, 2267505), (15, 1360503), (27, 755835), (41, 497745), (45, 453501), (81, 251945), (123, 165915), (135, 151167), (205, 99549), (369, 55305), (405, 50389), (615, 33183), (1107, 18435), (1229, 16605), (1845, 11061), (3321, 6145), (3687, 5535)]