19977705

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1223}}^1$

素因数の和:1259

約数の個数: 48

約数和(自身を含む): 39070080

約数和(自身を除く): 19092375

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 121, 135, 165, 297, 363, 495, 605, 1089, 1223, 1485, 1815, 3267, 3669, 5445, 6115, 11007, 13453, 16335, 18345, 33021, 40359, 55035, 67265, 121077, 147983, 165105, 201795, 363231, 443949, 605385, 739915, 1331847, 1816155, 2219745, 3995541, 6659235, 19977705]

約数ペア:

[(1, 19977705), (3, 6659235), (5, 3995541), (9, 2219745), (11, 1816155), (15, 1331847), (27, 739915), (33, 605385), (45, 443949), (55, 363231), (99, 201795), (121, 165105), (135, 147983), (165, 121077), (297, 67265), (363, 55035), (495, 40359), (605, 33021), (1089, 18345), (1223, 16335), (1485, 13453), (1815, 11007), (3267, 6115), (3669, 5445)]